Exhaust Package

The SOUL Performance Street Package is a premium aftermarket exhaust upgrade developed specifically for the Porsche 981 Cayman GT4, Boxster Spyder and GT4 Clubsport models manufactured between 2015 and 2016.

Fits:

• Porsche Boxster 981 Spyder 3.8L 2016
• Porsche Cayman GT4 3.8L 2015-16  

The package replaces the original exhaust manifold and catalytic converter assemblies, together with the factory rear exhaust system, to provide an integrated high-performance exhaust arrangement.

Unlike the SOUL Competition Package, which removes the factory catalytic converters, the Street Package incorporates high-flow catalytic converters within its long-tube headers.

These converters are designed to provide a less restrictive exhaust path while retaining catalytic exhaust treatment.

The headers feature 2-inch primary runners, smooth-radius tubing, port-matched mounting flanges and optimised collectors to support efficient exhaust gas movement away from the engine.

Manufactured from T304L stainless steel, the headers are engineered for durability, corrosion resistance and repeated exposure to high exhaust temperatures.

The accompanying SOUL Valved Exhaust System uses mandrel-bent stainless steel tubing, specially developed rear silencers and electronically controlled exhaust valves.

With the exhaust valves closed, gases are directed through sound-absorbing mufflers that reduce unwanted exhaust resonance and help maintain a more refined driving experience.

With the valves open, exhaust gases follow a more direct path, producing a louder, more pronounced flat-six soundtrack.

This dual-character design allows the driver to enjoy a sporting exhaust note while retaining the flexibility of selectable exhaust operation.

The package is designed to integrate with the appropriate original Porsche exhaust valve controls, allowing the driver to continue using the factory exhaust button.

The Street Package is designed for direct bolt-on installation on compatible vehicles, with manufacturer-supplied fitting instructions.

SOUL Performance also reports measurable performance improvements from its Long Tube Street Headers when combined with suitable ECU tuning.

Backed by the manufacturer's lifetime warranty, subject to the applicable terms, this package offers a comprehensive exhaust upgrade for owners seeking enhanced engine response, a more engaging flat-six sound and an integrated stainless steel exhaust system.

What This Product Does:
The Street Package replaces the original exhaust manifolds, catalytic converter assemblies and rear exhaust system with components designed to improve exhaust flow and provide selectable exhaust sound characteristics.

It consists of two main systems.

1. SOUL Performance Long Tube Street Headers

The Long Tube Street Headers collect exhaust gases as they leave the engine's cylinder heads.

They replace the original Porsche exhaust manifolds and catalytic converters with a stainless steel assembly incorporating long primary runners, optimised collectors and high-flow catalytic converters.

Their main functions include:
Collecting exhaust gases: Direct combustion gases away from the cylinder heads.
Improving exhaust flow: Use smooth-radius runners and carefully developed collectors.
Supporting exhaust scavenging: Encourage efficient exhaust pulse movement through the primary pipes.
Reducing unnecessary restriction: Use high-flow catalytic converters designed for improved gas flow.
Supporting engine performance: Help the naturally aspirated engine breathe more efficiently.
Improving throttle response: Support more responsive engine behaviour during acceleration.
Enhancing exhaust sound: Alter the exhaust pulse characteristics to create a stronger flat-six tone.
Retaining catalytic treatment: Pass exhaust gases through integrated high-flow catalytic converters.
Supporting high-RPM operation: Use a runner and collector design developed for the GT4's 3.8L engine.
Providing durability: Use stainless steel construction for demanding exhaust operating conditions.

2. SOUL Performance Valved Exhaust System

The Valved Exhaust System receives gases from the headers and directs them through the rear exhaust assembly.

Its electronically controlled valves provide two different exhaust sound characteristics.

The main functions include:
Directing exhaust gases towards the rear outlets.
Providing selectable exhaust sound modes.
Reducing unwanted resonance with the valves closed.
Producing a more aggressive exhaust note with the valves open.
Supporting efficient exhaust flow through mandrel-bent tubing.
Maintaining compatibility with the applicable factory exhaust valve controls.
Providing durable stainless steel rear silencers.
Enhancing the vehicle's rear appearance through selectable exhaust tips.

Why Upgrading Matters:
The SOUL Performance Street Package provides a comprehensive exhaust upgrade designed to improve exhaust flow, engine response and driving enjoyment.

1. Improved Exhaust Flow

The Long Tube Street Headers incorporate smooth-radius primary runners, optimised collectors and high-flow catalytic converters.

These components are designed to reduce unnecessary restrictions and improve exhaust gas movement.

2. Increased Performance Potential

SOUL Performance reports third-party dynamometer testing of its Long Tube Street Headers on a Dyno Dynamics dynamometer.

The manufacturer's published figures include:

• Approximately 30 wheel horsepower improvement in a tested configuration with supporting ECU tuning.
   Approximately
• Approximately 12 wheel horsepower incremental improvement attributed to the Street Headers after the ECU tune had been applied.

These figures relate to the Street Headers' published testing and should not be presented as independently verified gains for the complete Street Package.

Actual performance depends on the vehicle, ECU calibration, engine condition and other modifications.

3. Sharper Throttle Response

The freer-flowing headers are designed to help the engine respond more efficiently to accelerator input.

This can enhance the driving experience during acceleration, particularly at higher engine speeds.

4. Enhanced Flat-Six Sound

The combination of the long-tube headers and valved rear exhaust creates a more pronounced engine note.

The system is designed to highlight the naturally aspirated engine's characteristic sound without requiring permanently loud exhaust operation.

5. Selectable Exhaust Volume

The electronically controlled exhaust valves allow different exhaust sound modes.

This provides additional flexibility compared with a fixed, non-valved exhaust arrangement.

6. High-Flow Catalytic Converters

Unlike the catalyst-free Competition Package, the Street Package incorporates high-flow catalytic converters.

These provide catalytic exhaust treatment while being designed to reduce restriction.

However, their presence does not guarantee compliance with UK emissions, MOT or other public-road requirements.

7. Reduced Unwanted Drone

The SOUL mufflers incorporate sound-absorbing materials intended to minimise cabin resonance.

This is particularly beneficial during steady-speed driving.

8. Durable Stainless Steel Construction

The headers and rear exhaust use T304L stainless steel.

This material offers corrosion resistance and durability under repeated heating and cooling cycles.

9. Factory Exhaust Valve Control Compatibility

The Valved Exhaust System is designed to integrate with the appropriate original Porsche exhaust valve controls.

The driver can continue using the familiar factory exhaust control button.

10. Complete Integrated Upgrade

The package combines the Long Tube Street Headers and Valved Exhaust System in one manufacturer's exhaust solution.

This helps ensure the components are designed to work together.

11. Premium Exhaust Tip Options

A variety of stainless steel and titanium exhaust tips allows the owner to personalise the vehicle's rear appearance.

12. Manufacturer Warranty

SOUL Performance provides a lifetime warranty for the included exhaust components, subject to its published warranty conditions.

The SOUL Performance Street Package is a premium aftermarket exhaust upgrade developed specifically for the Porsche 981 Cayman GT4, Boxster Spyder and GT4 Clubsport models manufactured between 2015 and 2016.

Fits:

• Porsche Boxster 981 Spyder 3.8L 2016
• Porsche Cayman GT4 3.8L 2015-16  

The package replaces the original exhaust manifold and catalytic converter assemblies, together with the factory rear exhaust system, to provide an integrated high-performance exhaust arrangement.

Unlike the SOUL Competition Package, which removes the factory catalytic converters, the Street Package incorporates high-flow catalytic converters within its long-tube headers.

These converters are designed to provide a less restrictive exhaust path while retaining catalytic exhaust treatment.

The headers feature 2-inch primary runners, smooth-radius tubing, port-matched mounting flanges and optimised collectors to support efficient exhaust gas movement away from the engine.

Manufactured from T304L stainless steel, the headers are engineered for durability, corrosion resistance and repeated exposure to high exhaust temperatures.

The accompanying SOUL Valved Exhaust System uses mandrel-bent stainless steel tubing, specially developed rear silencers and electronically controlled exhaust valves.

With the exhaust valves closed, gases are directed through sound-absorbing mufflers that reduce unwanted exhaust resonance and help maintain a more refined driving experience.

With the valves open, exhaust gases follow a more direct path, producing a louder, more pronounced flat-six soundtrack.

This dual-character design allows the driver to enjoy a sporting exhaust note while retaining the flexibility of selectable exhaust operation.

The package is designed to integrate with the appropriate original Porsche exhaust valve controls, allowing the driver to continue using the factory exhaust button.

The Street Package is designed for direct bolt-on installation on compatible vehicles, with manufacturer-supplied fitting instructions.

SOUL Performance also reports measurable performance improvements from its Long Tube Street Headers when combined with suitable ECU tuning.

Backed by the manufacturer's lifetime warranty, subject to the applicable terms, this package offers a comprehensive exhaust upgrade for owners seeking enhanced engine response, a more engaging flat-six sound and an integrated stainless steel exhaust system.

What This Product Does:
The Street Package replaces the original exhaust manifolds, catalytic converter assemblies and rear exhaust system with components designed to improve exhaust flow and provide selectable exhaust sound characteristics.

It consists of two main systems.

1. SOUL Performance Long Tube Street Headers

The Long Tube Street Headers collect exhaust gases as they leave the engine's cylinder heads.

They replace the original Porsche exhaust manifolds and catalytic converters with a stainless steel assembly incorporating long primary runners, optimised collectors and high-flow catalytic converters.

Their main functions include:
Collecting exhaust gases: Direct combustion gases away from the cylinder heads.
Improving exhaust flow: Use smooth-radius runners and carefully developed collectors.
Supporting exhaust scavenging: Encourage efficient exhaust pulse movement through the primary pipes.
Reducing unnecessary restriction: Use high-flow catalytic converters designed for improved gas flow.
Supporting engine performance: Help the naturally aspirated engine breathe more efficiently.
Improving throttle response: Support more responsive engine behaviour during acceleration.
Enhancing exhaust sound: Alter the exhaust pulse characteristics to create a stronger flat-six tone.
Retaining catalytic treatment: Pass exhaust gases through integrated high-flow catalytic converters.
Supporting high-RPM operation: Use a runner and collector design developed for the GT4's 3.8L engine.
Providing durability: Use stainless steel construction for demanding exhaust operating conditions.

2. SOUL Performance Valved Exhaust System

The Valved Exhaust System receives gases from the headers and directs them through the rear exhaust assembly.

Its electronically controlled valves provide two different exhaust sound characteristics.

The main functions include:
Directing exhaust gases towards the rear outlets.
Providing selectable exhaust sound modes.
Reducing unwanted resonance with the valves closed.
Producing a more aggressive exhaust note with the valves open.
Supporting efficient exhaust flow through mandrel-bent tubing.
Maintaining compatibility with the applicable factory exhaust valve controls.
Providing durable stainless steel rear silencers.
Enhancing the vehicle's rear appearance through selectable exhaust tips.

Why Upgrading Matters:
The SOUL Performance Street Package provides a comprehensive exhaust upgrade designed to improve exhaust flow, engine response and driving enjoyment.

1. Improved Exhaust Flow

The Long Tube Street Headers incorporate smooth-radius primary runners, optimised collectors and high-flow catalytic converters.

These components are designed to reduce unnecessary restrictions and improve exhaust gas movement.

2. Increased Performance Potential

SOUL Performance reports third-party dynamometer testing of its Long Tube Street Headers on a Dyno Dynamics dynamometer.

The manufacturer's published figures include:

• Approximately 30 wheel horsepower improvement in a tested configuration with supporting ECU tuning.
   Approximately
• Approximately 12 wheel horsepower incremental improvement attributed to the Street Headers after the ECU tune had been applied.

These figures relate to the Street Headers' published testing and should not be presented as independently verified gains for the complete Street Package.

Actual performance depends on the vehicle, ECU calibration, engine condition and other modifications.

3. Sharper Throttle Response

The freer-flowing headers are designed to help the engine respond more efficiently to accelerator input.

This can enhance the driving experience during acceleration, particularly at higher engine speeds.

4. Enhanced Flat-Six Sound

The combination of the long-tube headers and valved rear exhaust creates a more pronounced engine note.

The system is designed to highlight the naturally aspirated engine's characteristic sound without requiring permanently loud exhaust operation.

5. Selectable Exhaust Volume

The electronically controlled exhaust valves allow different exhaust sound modes.

This provides additional flexibility compared with a fixed, non-valved exhaust arrangement.

6. High-Flow Catalytic Converters

Unlike the catalyst-free Competition Package, the Street Package incorporates high-flow catalytic converters.

These provide catalytic exhaust treatment while being designed to reduce restriction.

However, their presence does not guarantee compliance with UK emissions, MOT or other public-road requirements.

7. Reduced Unwanted Drone

The SOUL mufflers incorporate sound-absorbing materials intended to minimise cabin resonance.

This is particularly beneficial during steady-speed driving.

8. Durable Stainless Steel Construction

The headers and rear exhaust use T304L stainless steel.

This material offers corrosion resistance and durability under repeated heating and cooling cycles.

9. Factory Exhaust Valve Control Compatibility

The Valved Exhaust System is designed to integrate with the appropriate original Porsche exhaust valve controls.

The driver can continue using the familiar factory exhaust control button.

10. Complete Integrated Upgrade

The package combines the Long Tube Street Headers and Valved Exhaust System in one manufacturer's exhaust solution.

This helps ensure the components are designed to work together.

11. Premium Exhaust Tip Options

A variety of stainless steel and titanium exhaust tips allows the owner to personalise the vehicle's rear appearance.

12. Manufacturer Warranty

SOUL Performance provides a lifetime warranty for the included exhaust components, subject to its published warranty conditions.

The SOUL Performance Street Package is a premium aftermarket exhaust upgrade designed specifically for Porsche 987.2 Boxster and Cayman models manufactured between 2009 and 2012.

Fits:

• Porsche Boxster 987 MKII 2.9L 2009-12
• Porsche Boxster S 987 MKII 3.4L 2009-12
• Porsche Cayman 2.9L 987C MKII 2009-12
• Porsche Cayman S / R 3.4L 987C MKII 2009-12  

• Valved Exhaust System
• Long Tube Street Headers

Developed for the naturally aspirated 2.9-litre and 3.4-litre flat-six engines, this complete performance exhaust package combines SOUL Performance Long Tube Street Headers with its Valved Exhaust System.

The package replaces the original exhaust manifolds, primary catalytic converter assemblies and rear exhaust system with a carefully engineered stainless steel arrangement designed to improve exhaust flow, enhance engine responsiveness and deliver a more distinctive flat-six soundtrack.

Unlike a conventional rear silencer upgrade, the SOUL Street Package addresses exhaust flow throughout a larger section of the system, from the cylinder-head outlets to the rear exhaust tips.

The Long Tube Street Headers feature 2-inch primary runners, port-matched mounting flanges, smooth-radius tubing and optimised exhaust collectors.

These design features help minimise unnecessary exhaust restrictions and support efficient movement of combustion gases away from the engine.

The headers incorporate large-diameter, high-flow catalytic converters, providing a freer-flowing alternative to the factory catalyst arrangement while retaining catalytic exhaust treatment.

The accompanying SOUL Valved Exhaust System uses mandrel-bent T304L stainless steel tubing, reinforced performance silencers, vacuum-operated exhaust valves and an outlet X-pipe.

The exhaust valves allow the driver to select between two different sound characteristics.

With the valves closed, exhaust gases pass through specially developed sound-absorbing silencers, producing a refined yet sporting exhaust note designed to minimise unwanted cabin drone.

With the valves open, exhaust gases follow a more direct route through the performance exhaust, creating a louder and more aggressive flat-six soundtrack.

The system is designed for vehicles both with and without factory Porsche Sport Exhaust (PSE).

On PSE-equipped vehicles, the exhaust can work with the appropriate factory valve-control arrangement. For vehicles without PSE, the supplied SOUL valve controller provides selectable exhaust operation.

Manufactured using corrosion-resistant T304L stainless steel, the package is engineered for durability under repeated exhaust heating and cooling cycles.

SOUL Performance reports dynamometer-tested performance improvements for the combined package and provides a lifetime warranty for its exhaust components, subject to the manufacturer's conditions.

The Street Package is ideal for Porsche enthusiasts seeking improved exhaust flow, enhanced engine response, selectable exhaust sound and a comprehensive performance exhaust upgrade.

What This Product Does:
The SOUL Performance Street Package replaces the factory exhaust manifold and rear exhaust assemblies with components designed to improve gas flow and provide selectable exhaust sound characteristics.

It consists of two principal components.

1. SOUL Performance Long Tube Street Headers

The Long Tube Street Headers collect combustion gases leaving the engine's cylinder heads and direct them into the downstream exhaust.

Their main functions include:

• Collecting exhaust gases: Direct combustion gases away from the cylinder heads.
  
• Improving exhaust flow: Use long runners and smooth internal passages to reduce unnecessary restrictions.
  
• Supporting exhaust scavenging: Employ carefully developed runner and collector geometry to encourage efficient exhaust pulse movement. Improving throttle response: Support more responsive engine behaviour during acceleration.
  
• Increasing performance potential: Help the engine breathe more efficiently.
  
• Retaining catalytic treatment: Pass exhaust gases through integrated high-flow catalytic converters.
  
• Enhancing engine sound: Alter the exhaust flow characteristics to produce a fuller flat-six tone.
  
• Supporting durability: Use stainless steel construction for high-temperature operation.

The 2-inch primary runners are designed for the characteristics of the 987.2 flat-six engine family.

2. SOUL Performance Valved Exhaust System

The Valved Exhaust System receives exhaust gases from the headers and directs them through the rear exhaust assembly.

Its vacuum-operated valves allow different exhaust flow paths and resulting sound characteristics.

Its main functions include:

• Directing exhaust gases towards the rear outlets.
• Providing selectable quiet and aggressive exhaust modes.
• Reducing unwanted drone with the valves closed.
• Producing a stronger exhaust note with the valves open.
• Supporting efficient exhaust flow through mandrel-bent pipework.
• Allowing operation through the appropriate factory or supplied valve controller.
• Providing reinforced exhaust silencers and mounting brackets.
• Enhancing rear styling with a choice of exhaust tips.       

Valves Closed – Refined Touring Sound

With the exhaust valves closed, gases pass through the specially developed rear silencers.

The silencers contain sound-absorbing material designed to reduce unwanted resonance while retaining a sporting exhaust note.

Benefits include:

• A deeper and more refined flat-six sound.
• Reduced low-frequency cabin drone.
• More controlled exhaust volume during steady driving.
• Improved comfort during longer journeys.
• A suitable sound setting when maximum exhaust volume is not desired.

SOUL describes its closed-valve mode as designed for daily driving without excessive drone. However, the sound of the complete Street Package may differ from that of the valved exhaust fitted with standard headers.

Valves Open – Aggressive Flat-Six Sound

With the valves open, exhaust gases follow a more direct route through the rear exhaust.

This allows more of the engine's natural exhaust sound to be heard.

Benefits include:

• A louder, more aggressive exhaust note.
• Greater sound intensity during acceleration.
• More pronounced flat-six character at higher engine speeds.
• Stronger exhaust sound during downshifts.
• A more engaging driving experience.

The final sound depends on engine specification, ECU calibration, vehicle condition and driving circumstances.

Why Upgrading Matters:

1. Improved Exhaust Flow

The Long Tube Street Headers use smooth-radius runners, port-matched flanges and optimised collectors.

Together with the high-flow catalytic converters and performance rear exhaust, these components are intended to improve the movement of exhaust gases.

2. Increased Performance Potential

SOUL Performance reports dynamometer testing of the combined system on a Porsche 987.2 Cayman S equipped with PDK transmission.

The manufacturer recorded maximum gains of approximately:

8 wheel horsepower. 11 lb-ft of torque.

These improvements were recorded around 4,100 RPM in the tested configuration.

The results depend on the vehicle, testing conditions and installed components and should not be presented as guaranteed gains.

3. Sharper Throttle Response

Improved exhaust gas flow may help the naturally aspirated flat-six engine respond more readily to accelerator input.

4. Enhanced Flat-Six Sound

The combination of long-tube headers and the valved rear exhaust produces a more pronounced engine soundtrack.

Drivers can select different exhaust sound characteristics according to preference.

5. Selectable Exhaust Volume

The vacuum-operated exhaust valves allow the driver to change between a refined and an aggressive exhaust setting.

This provides greater versatility than a permanently loud, non-valved system.

6. High-Flow Catalytic Converters

Unlike the catalyst-free Competition Package, the Street Package incorporates catalytic converters.

These are designed to reduce exhaust restriction while providing catalytic exhaust treatment.

Their presence does not automatically establish emissions or road-use compliance.

7. Reduced Unwanted Drone

The rear silencers are designed to minimise low-frequency cabin resonance.

This is particularly valuable during steady-speed driving.

8. Compatibility with Factory PSE

The system can be installed on vehicles with factory Porsche Sport Exhaust.

It is also suitable for non-PSE vehicles using the supplied SOUL valve controller.

9. Stainless Steel Durability

The T304L stainless steel headers and rear exhaust offer corrosion resistance and durability under high-temperature operating conditions.

10. Reinforced Exhaust Construction

The Valved Exhaust System incorporates reinforced silencer casings and strengthened mounting brackets to withstand exhaust vibration and thermal cycling.

11. Reduced Weight

SOUL reports that its Valved Exhaust System weighs approximately 5 lb less than the factory rear exhaust components.

The separately listed Street Headers also have a manufacturer-reported weight reduction.

These figures relate to the individual components and should not be presented as a verified complete-package weight saving without confirmation.

12. Premium Exhaust Tip Options

The package offers a selection of stainless steel and titanium exhaust tips.

This allows owners to customise the rear appearance of their vehicle.

13. Complete Integrated Exhaust Upgrade

The package combines the manufacturer's Long Tube Street Headers and Valved Exhaust System into one compatible exhaust solution.

14. Manufacturer Lifetime Warranty

SOUL Performance provides a lifetime warranty for its exhaust components, subject to the published warranty terms.

The SOUL Performance Street Package is a premium aftermarket exhaust upgrade designed specifically for Porsche 987.2 Boxster and Cayman models manufactured between 2009 and 2012.

Fits:

• Porsche Boxster 987 MKII 2.9L 2009-12
• Porsche Boxster S 987 MKII 3.4L 2009-12
• Porsche Cayman 2.9L 987C MKII 2009-12
• Porsche Cayman S / R 3.4L 987C MKII 2009-12  

• Valved Exhaust System
• Long Tube Street Headers

Developed for the naturally aspirated 2.9-litre and 3.4-litre flat-six engines, this complete performance exhaust package combines SOUL Performance Long Tube Street Headers with its Valved Exhaust System.

The package replaces the original exhaust manifolds, primary catalytic converter assemblies and rear exhaust system with a carefully engineered stainless steel arrangement designed to improve exhaust flow, enhance engine responsiveness and deliver a more distinctive flat-six soundtrack.

Unlike a conventional rear silencer upgrade, the SOUL Street Package addresses exhaust flow throughout a larger section of the system, from the cylinder-head outlets to the rear exhaust tips.

The Long Tube Street Headers feature 2-inch primary runners, port-matched mounting flanges, smooth-radius tubing and optimised exhaust collectors.

These design features help minimise unnecessary exhaust restrictions and support efficient movement of combustion gases away from the engine.

The headers incorporate large-diameter, high-flow catalytic converters, providing a freer-flowing alternative to the factory catalyst arrangement while retaining catalytic exhaust treatment.

The accompanying SOUL Valved Exhaust System uses mandrel-bent T304L stainless steel tubing, reinforced performance silencers, vacuum-operated exhaust valves and an outlet X-pipe.

The exhaust valves allow the driver to select between two different sound characteristics.

With the valves closed, exhaust gases pass through specially developed sound-absorbing silencers, producing a refined yet sporting exhaust note designed to minimise unwanted cabin drone.

With the valves open, exhaust gases follow a more direct route through the performance exhaust, creating a louder and more aggressive flat-six soundtrack.

The system is designed for vehicles both with and without factory Porsche Sport Exhaust (PSE).

On PSE-equipped vehicles, the exhaust can work with the appropriate factory valve-control arrangement. For vehicles without PSE, the supplied SOUL valve controller provides selectable exhaust operation.

Manufactured using corrosion-resistant T304L stainless steel, the package is engineered for durability under repeated exhaust heating and cooling cycles.

SOUL Performance reports dynamometer-tested performance improvements for the combined package and provides a lifetime warranty for its exhaust components, subject to the manufacturer's conditions.

The Street Package is ideal for Porsche enthusiasts seeking improved exhaust flow, enhanced engine response, selectable exhaust sound and a comprehensive performance exhaust upgrade.

What This Product Does:
The SOUL Performance Street Package replaces the factory exhaust manifold and rear exhaust assemblies with components designed to improve gas flow and provide selectable exhaust sound characteristics.

It consists of two principal components.

1. SOUL Performance Long Tube Street Headers

The Long Tube Street Headers collect combustion gases leaving the engine's cylinder heads and direct them into the downstream exhaust.

Their main functions include:

• Collecting exhaust gases: Direct combustion gases away from the cylinder heads.
  
• Improving exhaust flow: Use long runners and smooth internal passages to reduce unnecessary restrictions.
  
• Supporting exhaust scavenging: Employ carefully developed runner and collector geometry to encourage efficient exhaust pulse movement. Improving throttle response: Support more responsive engine behaviour during acceleration.
  
• Increasing performance potential: Help the engine breathe more efficiently.
  
• Retaining catalytic treatment: Pass exhaust gases through integrated high-flow catalytic converters.
  
• Enhancing engine sound: Alter the exhaust flow characteristics to produce a fuller flat-six tone.
  
• Supporting durability: Use stainless steel construction for high-temperature operation.

The 2-inch primary runners are designed for the characteristics of the 987.2 flat-six engine family.

2. SOUL Performance Valved Exhaust System

The Valved Exhaust System receives exhaust gases from the headers and directs them through the rear exhaust assembly.

Its vacuum-operated valves allow different exhaust flow paths and resulting sound characteristics.

Its main functions include:

• Directing exhaust gases towards the rear outlets.
• Providing selectable quiet and aggressive exhaust modes.
• Reducing unwanted drone with the valves closed.
• Producing a stronger exhaust note with the valves open.
• Supporting efficient exhaust flow through mandrel-bent pipework.
• Allowing operation through the appropriate factory or supplied valve controller.
• Providing reinforced exhaust silencers and mounting brackets.
• Enhancing rear styling with a choice of exhaust tips.       

Valves Closed – Refined Touring Sound

With the exhaust valves closed, gases pass through the specially developed rear silencers.

The silencers contain sound-absorbing material designed to reduce unwanted resonance while retaining a sporting exhaust note.

Benefits include:

• A deeper and more refined flat-six sound.
• Reduced low-frequency cabin drone.
• More controlled exhaust volume during steady driving.
• Improved comfort during longer journeys.
• A suitable sound setting when maximum exhaust volume is not desired.

SOUL describes its closed-valve mode as designed for daily driving without excessive drone. However, the sound of the complete Street Package may differ from that of the valved exhaust fitted with standard headers.

Valves Open – Aggressive Flat-Six Sound

With the valves open, exhaust gases follow a more direct route through the rear exhaust.

This allows more of the engine's natural exhaust sound to be heard.

Benefits include:

• A louder, more aggressive exhaust note.
• Greater sound intensity during acceleration.
• More pronounced flat-six character at higher engine speeds.
• Stronger exhaust sound during downshifts.
• A more engaging driving experience.

The final sound depends on engine specification, ECU calibration, vehicle condition and driving circumstances.

Why Upgrading Matters:

1. Improved Exhaust Flow

The Long Tube Street Headers use smooth-radius runners, port-matched flanges and optimised collectors.

Together with the high-flow catalytic converters and performance rear exhaust, these components are intended to improve the movement of exhaust gases.

2. Increased Performance Potential

SOUL Performance reports dynamometer testing of the combined system on a Porsche 987.2 Cayman S equipped with PDK transmission.

The manufacturer recorded maximum gains of approximately:

8 wheel horsepower. 11 lb-ft of torque.

These improvements were recorded around 4,100 RPM in the tested configuration.

The results depend on the vehicle, testing conditions and installed components and should not be presented as guaranteed gains.

3. Sharper Throttle Response

Improved exhaust gas flow may help the naturally aspirated flat-six engine respond more readily to accelerator input.

4. Enhanced Flat-Six Sound

The combination of long-tube headers and the valved rear exhaust produces a more pronounced engine soundtrack.

Drivers can select different exhaust sound characteristics according to preference.

5. Selectable Exhaust Volume

The vacuum-operated exhaust valves allow the driver to change between a refined and an aggressive exhaust setting.

This provides greater versatility than a permanently loud, non-valved system.

6. High-Flow Catalytic Converters

Unlike the catalyst-free Competition Package, the Street Package incorporates catalytic converters.

These are designed to reduce exhaust restriction while providing catalytic exhaust treatment.

Their presence does not automatically establish emissions or road-use compliance.

7. Reduced Unwanted Drone

The rear silencers are designed to minimise low-frequency cabin resonance.

This is particularly valuable during steady-speed driving.

8. Compatibility with Factory PSE

The system can be installed on vehicles with factory Porsche Sport Exhaust.

It is also suitable for non-PSE vehicles using the supplied SOUL valve controller.

9. Stainless Steel Durability

The T304L stainless steel headers and rear exhaust offer corrosion resistance and durability under high-temperature operating conditions.

10. Reinforced Exhaust Construction

The Valved Exhaust System incorporates reinforced silencer casings and strengthened mounting brackets to withstand exhaust vibration and thermal cycling.

11. Reduced Weight

SOUL reports that its Valved Exhaust System weighs approximately 5 lb less than the factory rear exhaust components.

The separately listed Street Headers also have a manufacturer-reported weight reduction.

These figures relate to the individual components and should not be presented as a verified complete-package weight saving without confirmation.

12. Premium Exhaust Tip Options

The package offers a selection of stainless steel and titanium exhaust tips.

This allows owners to customise the rear appearance of their vehicle.

13. Complete Integrated Exhaust Upgrade

The package combines the manufacturer's Long Tube Street Headers and Valved Exhaust System into one compatible exhaust solution.

14. Manufacturer Lifetime Warranty

SOUL Performance provides a lifetime warranty for its exhaust components, subject to the published warranty terms.

The SOUL Performance Street Package is a premium aftermarket exhaust upgrade developed specifically for the Porsche 981 Cayman GT4, Boxster Spyder and GT4 Clubsport models manufactured between 2015 and 2016.

Fits:

• Porsche Boxster 981 Spyder 3.8L 2016
• Porsche Cayman GT4 3.8L 2015-16  

The package replaces the original exhaust manifold and catalytic converter assemblies, together with the factory rear exhaust system, to provide an integrated high-performance exhaust arrangement.

Unlike the SOUL Competition Package, which removes the factory catalytic converters, the Street Package incorporates high-flow catalytic converters within its long-tube headers.

These converters are designed to provide a less restrictive exhaust path while retaining catalytic exhaust treatment.

The headers feature 2-inch primary runners, smooth-radius tubing, port-matched mounting flanges and optimised collectors to support efficient exhaust gas movement away from the engine.

Manufactured from T304L stainless steel, the headers are engineered for durability, corrosion resistance and repeated exposure to high exhaust temperatures.

The accompanying SOUL Valved Exhaust System uses mandrel-bent stainless steel tubing, specially developed rear silencers and electronically controlled exhaust valves.

With the exhaust valves closed, gases are directed through sound-absorbing mufflers that reduce unwanted exhaust resonance and help maintain a more refined driving experience.

With the valves open, exhaust gases follow a more direct path, producing a louder, more pronounced flat-six soundtrack.

This dual-character design allows the driver to enjoy a sporting exhaust note while retaining the flexibility of selectable exhaust operation.

The package is designed to integrate with the appropriate original Porsche exhaust valve controls, allowing the driver to continue using the factory exhaust button.

The Street Package is designed for direct bolt-on installation on compatible vehicles, with manufacturer-supplied fitting instructions.

SOUL Performance also reports measurable performance improvements from its Long Tube Street Headers when combined with suitable ECU tuning.

Backed by the manufacturer's lifetime warranty, subject to the applicable terms, this package offers a comprehensive exhaust upgrade for owners seeking enhanced engine response, a more engaging flat-six sound and an integrated stainless steel exhaust system.

What This Product Does:
The Street Package replaces the original exhaust manifolds, catalytic converter assemblies and rear exhaust system with components designed to improve exhaust flow and provide selectable exhaust sound characteristics.

It consists of two main systems.

1. SOUL Performance Long Tube Street Headers

The Long Tube Street Headers collect exhaust gases as they leave the engine's cylinder heads.

They replace the original Porsche exhaust manifolds and catalytic converters with a stainless steel assembly incorporating long primary runners, optimised collectors and high-flow catalytic converters.

Their main functions include:
Collecting exhaust gases: Direct combustion gases away from the cylinder heads.
Improving exhaust flow: Use smooth-radius runners and carefully developed collectors.
Supporting exhaust scavenging: Encourage efficient exhaust pulse movement through the primary pipes.
Reducing unnecessary restriction: Use high-flow catalytic converters designed for improved gas flow.
Supporting engine performance: Help the naturally aspirated engine breathe more efficiently.
Improving throttle response: Support more responsive engine behaviour during acceleration.
Enhancing exhaust sound: Alter the exhaust pulse characteristics to create a stronger flat-six tone.
Retaining catalytic treatment: Pass exhaust gases through integrated high-flow catalytic converters.
Supporting high-RPM operation: Use a runner and collector design developed for the GT4's 3.8L engine.
Providing durability: Use stainless steel construction for demanding exhaust operating conditions.

2. SOUL Performance Valved Exhaust System

The Valved Exhaust System receives gases from the headers and directs them through the rear exhaust assembly.

Its electronically controlled valves provide two different exhaust sound characteristics.

The main functions include:
Directing exhaust gases towards the rear outlets.
Providing selectable exhaust sound modes.
Reducing unwanted resonance with the valves closed.
Producing a more aggressive exhaust note with the valves open.
Supporting efficient exhaust flow through mandrel-bent tubing.
Maintaining compatibility with the applicable factory exhaust valve controls.
Providing durable stainless steel rear silencers.
Enhancing the vehicle's rear appearance through selectable exhaust tips.

Why Upgrading Matters:
The SOUL Performance Street Package provides a comprehensive exhaust upgrade designed to improve exhaust flow, engine response and driving enjoyment.

1. Improved Exhaust Flow

The Long Tube Street Headers incorporate smooth-radius primary runners, optimised collectors and high-flow catalytic converters.

These components are designed to reduce unnecessary restrictions and improve exhaust gas movement.

2. Increased Performance Potential

SOUL Performance reports third-party dynamometer testing of its Long Tube Street Headers on a Dyno Dynamics dynamometer.

The manufacturer's published figures include:

• Approximately 30 wheel horsepower improvement in a tested configuration with supporting ECU tuning.
   Approximately
• Approximately 12 wheel horsepower incremental improvement attributed to the Street Headers after the ECU tune had been applied.

These figures relate to the Street Headers' published testing and should not be presented as independently verified gains for the complete Street Package.

Actual performance depends on the vehicle, ECU calibration, engine condition and other modifications.

3. Sharper Throttle Response

The freer-flowing headers are designed to help the engine respond more efficiently to accelerator input.

This can enhance the driving experience during acceleration, particularly at higher engine speeds.

4. Enhanced Flat-Six Sound

The combination of the long-tube headers and valved rear exhaust creates a more pronounced engine note.

The system is designed to highlight the naturally aspirated engine's characteristic sound without requiring permanently loud exhaust operation.

5. Selectable Exhaust Volume

The electronically controlled exhaust valves allow different exhaust sound modes.

This provides additional flexibility compared with a fixed, non-valved exhaust arrangement.

6. High-Flow Catalytic Converters

Unlike the catalyst-free Competition Package, the Street Package incorporates high-flow catalytic converters.

These provide catalytic exhaust treatment while being designed to reduce restriction.

However, their presence does not guarantee compliance with UK emissions, MOT or other public-road requirements.

7. Reduced Unwanted Drone

The SOUL mufflers incorporate sound-absorbing materials intended to minimise cabin resonance.

This is particularly beneficial during steady-speed driving.

8. Durable Stainless Steel Construction

The headers and rear exhaust use T304L stainless steel.

This material offers corrosion resistance and durability under repeated heating and cooling cycles.

9. Factory Exhaust Valve Control Compatibility

The Valved Exhaust System is designed to integrate with the appropriate original Porsche exhaust valve controls.

The driver can continue using the familiar factory exhaust control button.

10. Complete Integrated Upgrade

The package combines the Long Tube Street Headers and Valved Exhaust System in one manufacturer's exhaust solution.

This helps ensure the components are designed to work together.

11. Premium Exhaust Tip Options

A variety of stainless steel and titanium exhaust tips allows the owner to personalise the vehicle's rear appearance.

12. Manufacturer Warranty

SOUL Performance provides a lifetime warranty for the included exhaust components, subject to its published warranty conditions.

The SOUL Performance Street Package is a premium aftermarket exhaust upgrade designed specifically for Porsche 987.2 Boxster and Cayman models manufactured between 2009 and 2012.

Fits:

• Porsche Boxster 987 MKII 2.9L 2009-12
• Porsche Boxster S 987 MKII 3.4L 2009-12
• Porsche Cayman 2.9L 987C MKII 2009-12
• Porsche Cayman S / R 3.4L 987C MKII 2009-12  

• Valved Exhaust System
• Long Tube Street Headers

Developed for the naturally aspirated 2.9-litre and 3.4-litre flat-six engines, this complete performance exhaust package combines SOUL Performance Long Tube Street Headers with its Valved Exhaust System.

The package replaces the original exhaust manifolds, primary catalytic converter assemblies and rear exhaust system with a carefully engineered stainless steel arrangement designed to improve exhaust flow, enhance engine responsiveness and deliver a more distinctive flat-six soundtrack.

Unlike a conventional rear silencer upgrade, the SOUL Street Package addresses exhaust flow throughout a larger section of the system, from the cylinder-head outlets to the rear exhaust tips.

The Long Tube Street Headers feature 2-inch primary runners, port-matched mounting flanges, smooth-radius tubing and optimised exhaust collectors.

These design features help minimise unnecessary exhaust restrictions and support efficient movement of combustion gases away from the engine.

The headers incorporate large-diameter, high-flow catalytic converters, providing a freer-flowing alternative to the factory catalyst arrangement while retaining catalytic exhaust treatment.

The accompanying SOUL Valved Exhaust System uses mandrel-bent T304L stainless steel tubing, reinforced performance silencers, vacuum-operated exhaust valves and an outlet X-pipe.

The exhaust valves allow the driver to select between two different sound characteristics.

With the valves closed, exhaust gases pass through specially developed sound-absorbing silencers, producing a refined yet sporting exhaust note designed to minimise unwanted cabin drone.

With the valves open, exhaust gases follow a more direct route through the performance exhaust, creating a louder and more aggressive flat-six soundtrack.

The system is designed for vehicles both with and without factory Porsche Sport Exhaust (PSE).

On PSE-equipped vehicles, the exhaust can work with the appropriate factory valve-control arrangement. For vehicles without PSE, the supplied SOUL valve controller provides selectable exhaust operation.

Manufactured using corrosion-resistant T304L stainless steel, the package is engineered for durability under repeated exhaust heating and cooling cycles.

SOUL Performance reports dynamometer-tested performance improvements for the combined package and provides a lifetime warranty for its exhaust components, subject to the manufacturer's conditions.

The Street Package is ideal for Porsche enthusiasts seeking improved exhaust flow, enhanced engine response, selectable exhaust sound and a comprehensive performance exhaust upgrade.

What This Product Does:
The SOUL Performance Street Package replaces the factory exhaust manifold and rear exhaust assemblies with components designed to improve gas flow and provide selectable exhaust sound characteristics.

It consists of two principal components.

1. SOUL Performance Long Tube Street Headers

The Long Tube Street Headers collect combustion gases leaving the engine's cylinder heads and direct them into the downstream exhaust.

Their main functions include:

• Collecting exhaust gases: Direct combustion gases away from the cylinder heads.
  
• Improving exhaust flow: Use long runners and smooth internal passages to reduce unnecessary restrictions.
  
• Supporting exhaust scavenging: Employ carefully developed runner and collector geometry to encourage efficient exhaust pulse movement. Improving throttle response: Support more responsive engine behaviour during acceleration.
  
• Increasing performance potential: Help the engine breathe more efficiently.
  
• Retaining catalytic treatment: Pass exhaust gases through integrated high-flow catalytic converters.
  
• Enhancing engine sound: Alter the exhaust flow characteristics to produce a fuller flat-six tone.
  
• Supporting durability: Use stainless steel construction for high-temperature operation.

The 2-inch primary runners are designed for the characteristics of the 987.2 flat-six engine family.

2. SOUL Performance Valved Exhaust System

The Valved Exhaust System receives exhaust gases from the headers and directs them through the rear exhaust assembly.

Its vacuum-operated valves allow different exhaust flow paths and resulting sound characteristics.

Its main functions include:

• Directing exhaust gases towards the rear outlets.
• Providing selectable quiet and aggressive exhaust modes.
• Reducing unwanted drone with the valves closed.
• Producing a stronger exhaust note with the valves open.
• Supporting efficient exhaust flow through mandrel-bent pipework.
• Allowing operation through the appropriate factory or supplied valve controller.
• Providing reinforced exhaust silencers and mounting brackets.
• Enhancing rear styling with a choice of exhaust tips.       

Valves Closed – Refined Touring Sound

With the exhaust valves closed, gases pass through the specially developed rear silencers.

The silencers contain sound-absorbing material designed to reduce unwanted resonance while retaining a sporting exhaust note.

Benefits include:

• A deeper and more refined flat-six sound.
• Reduced low-frequency cabin drone.
• More controlled exhaust volume during steady driving.
• Improved comfort during longer journeys.
• A suitable sound setting when maximum exhaust volume is not desired.

SOUL describes its closed-valve mode as designed for daily driving without excessive drone. However, the sound of the complete Street Package may differ from that of the valved exhaust fitted with standard headers.

Valves Open – Aggressive Flat-Six Sound

With the valves open, exhaust gases follow a more direct route through the rear exhaust.

This allows more of the engine's natural exhaust sound to be heard.

Benefits include:

• A louder, more aggressive exhaust note.
• Greater sound intensity during acceleration.
• More pronounced flat-six character at higher engine speeds.
• Stronger exhaust sound during downshifts.
• A more engaging driving experience.

The final sound depends on engine specification, ECU calibration, vehicle condition and driving circumstances.

Why Upgrading Matters:

1. Improved Exhaust Flow

The Long Tube Street Headers use smooth-radius runners, port-matched flanges and optimised collectors.

Together with the high-flow catalytic converters and performance rear exhaust, these components are intended to improve the movement of exhaust gases.

2. Increased Performance Potential

SOUL Performance reports dynamometer testing of the combined system on a Porsche 987.2 Cayman S equipped with PDK transmission.

The manufacturer recorded maximum gains of approximately:

8 wheel horsepower. 11 lb-ft of torque.

These improvements were recorded around 4,100 RPM in the tested configuration.

The results depend on the vehicle, testing conditions and installed components and should not be presented as guaranteed gains.

3. Sharper Throttle Response

Improved exhaust gas flow may help the naturally aspirated flat-six engine respond more readily to accelerator input.

4. Enhanced Flat-Six Sound

The combination of long-tube headers and the valved rear exhaust produces a more pronounced engine soundtrack.

Drivers can select different exhaust sound characteristics according to preference.

5. Selectable Exhaust Volume

The vacuum-operated exhaust valves allow the driver to change between a refined and an aggressive exhaust setting.

This provides greater versatility than a permanently loud, non-valved system.

6. High-Flow Catalytic Converters

Unlike the catalyst-free Competition Package, the Street Package incorporates catalytic converters.

These are designed to reduce exhaust restriction while providing catalytic exhaust treatment.

Their presence does not automatically establish emissions or road-use compliance.

7. Reduced Unwanted Drone

The rear silencers are designed to minimise low-frequency cabin resonance.

This is particularly valuable during steady-speed driving.

8. Compatibility with Factory PSE

The system can be installed on vehicles with factory Porsche Sport Exhaust.

It is also suitable for non-PSE vehicles using the supplied SOUL valve controller.

9. Stainless Steel Durability

The T304L stainless steel headers and rear exhaust offer corrosion resistance and durability under high-temperature operating conditions.

10. Reinforced Exhaust Construction

The Valved Exhaust System incorporates reinforced silencer casings and strengthened mounting brackets to withstand exhaust vibration and thermal cycling.

11. Reduced Weight

SOUL reports that its Valved Exhaust System weighs approximately 5 lb less than the factory rear exhaust components.

The separately listed Street Headers also have a manufacturer-reported weight reduction.

These figures relate to the individual components and should not be presented as a verified complete-package weight saving without confirmation.

12. Premium Exhaust Tip Options

The package offers a selection of stainless steel and titanium exhaust tips.

This allows owners to customise the rear appearance of their vehicle.

13. Complete Integrated Exhaust Upgrade

The package combines the manufacturer's Long Tube Street Headers and Valved Exhaust System into one compatible exhaust solution.

14. Manufacturer Lifetime Warranty

SOUL Performance provides a lifetime warranty for its exhaust components, subject to the published warranty terms.

The SOUL Performance Street Package is a premium aftermarket exhaust upgrade designed specifically for Porsche 987.2 Boxster and Cayman models manufactured between 2009 and 2012.

Fits:

• Porsche Boxster 987 MKII 2.9L 2009-12
• Porsche Boxster S 987 MKII 3.4L 2009-12
• Porsche Cayman 2.9L 987C MKII 2009-12
• Porsche Cayman S / R 3.4L 987C MKII 2009-12  

• Valved Exhaust System
• Long Tube Street Headers

Developed for the naturally aspirated 2.9-litre and 3.4-litre flat-six engines, this complete performance exhaust package combines SOUL Performance Long Tube Street Headers with its Valved Exhaust System.

The package replaces the original exhaust manifolds, primary catalytic converter assemblies and rear exhaust system with a carefully engineered stainless steel arrangement designed to improve exhaust flow, enhance engine responsiveness and deliver a more distinctive flat-six soundtrack.

Unlike a conventional rear silencer upgrade, the SOUL Street Package addresses exhaust flow throughout a larger section of the system, from the cylinder-head outlets to the rear exhaust tips.

The Long Tube Street Headers feature 2-inch primary runners, port-matched mounting flanges, smooth-radius tubing and optimised exhaust collectors.

These design features help minimise unnecessary exhaust restrictions and support efficient movement of combustion gases away from the engine.

The headers incorporate large-diameter, high-flow catalytic converters, providing a freer-flowing alternative to the factory catalyst arrangement while retaining catalytic exhaust treatment.

The accompanying SOUL Valved Exhaust System uses mandrel-bent T304L stainless steel tubing, reinforced performance silencers, vacuum-operated exhaust valves and an outlet X-pipe.

The exhaust valves allow the driver to select between two different sound characteristics.

With the valves closed, exhaust gases pass through specially developed sound-absorbing silencers, producing a refined yet sporting exhaust note designed to minimise unwanted cabin drone.

With the valves open, exhaust gases follow a more direct route through the performance exhaust, creating a louder and more aggressive flat-six soundtrack.

The system is designed for vehicles both with and without factory Porsche Sport Exhaust (PSE).

On PSE-equipped vehicles, the exhaust can work with the appropriate factory valve-control arrangement. For vehicles without PSE, the supplied SOUL valve controller provides selectable exhaust operation.

Manufactured using corrosion-resistant T304L stainless steel, the package is engineered for durability under repeated exhaust heating and cooling cycles.

SOUL Performance reports dynamometer-tested performance improvements for the combined package and provides a lifetime warranty for its exhaust components, subject to the manufacturer's conditions.

The Street Package is ideal for Porsche enthusiasts seeking improved exhaust flow, enhanced engine response, selectable exhaust sound and a comprehensive performance exhaust upgrade.

What This Product Does:
The SOUL Performance Street Package replaces the factory exhaust manifold and rear exhaust assemblies with components designed to improve gas flow and provide selectable exhaust sound characteristics.

It consists of two principal components.

1. SOUL Performance Long Tube Street Headers

The Long Tube Street Headers collect combustion gases leaving the engine's cylinder heads and direct them into the downstream exhaust.

Their main functions include:

• Collecting exhaust gases: Direct combustion gases away from the cylinder heads.
  
• Improving exhaust flow: Use long runners and smooth internal passages to reduce unnecessary restrictions.
  
• Supporting exhaust scavenging: Employ carefully developed runner and collector geometry to encourage efficient exhaust pulse movement. Improving throttle response: Support more responsive engine behaviour during acceleration.
  
• Increasing performance potential: Help the engine breathe more efficiently.
  
• Retaining catalytic treatment: Pass exhaust gases through integrated high-flow catalytic converters.
  
• Enhancing engine sound: Alter the exhaust flow characteristics to produce a fuller flat-six tone.
  
• Supporting durability: Use stainless steel construction for high-temperature operation.

The 2-inch primary runners are designed for the characteristics of the 987.2 flat-six engine family.

2. SOUL Performance Valved Exhaust System

The Valved Exhaust System receives exhaust gases from the headers and directs them through the rear exhaust assembly.

Its vacuum-operated valves allow different exhaust flow paths and resulting sound characteristics.

Its main functions include:

• Directing exhaust gases towards the rear outlets.
• Providing selectable quiet and aggressive exhaust modes.
• Reducing unwanted drone with the valves closed.
• Producing a stronger exhaust note with the valves open.
• Supporting efficient exhaust flow through mandrel-bent pipework.
• Allowing operation through the appropriate factory or supplied valve controller.
• Providing reinforced exhaust silencers and mounting brackets.
• Enhancing rear styling with a choice of exhaust tips.       

Valves Closed – Refined Touring Sound

With the exhaust valves closed, gases pass through the specially developed rear silencers.

The silencers contain sound-absorbing material designed to reduce unwanted resonance while retaining a sporting exhaust note.

Benefits include:

• A deeper and more refined flat-six sound.
• Reduced low-frequency cabin drone.
• More controlled exhaust volume during steady driving.
• Improved comfort during longer journeys.
• A suitable sound setting when maximum exhaust volume is not desired.

SOUL describes its closed-valve mode as designed for daily driving without excessive drone. However, the sound of the complete Street Package may differ from that of the valved exhaust fitted with standard headers.

Valves Open – Aggressive Flat-Six Sound

With the valves open, exhaust gases follow a more direct route through the rear exhaust.

This allows more of the engine's natural exhaust sound to be heard.

Benefits include:

• A louder, more aggressive exhaust note.
• Greater sound intensity during acceleration.
• More pronounced flat-six character at higher engine speeds.
• Stronger exhaust sound during downshifts.
• A more engaging driving experience.

The final sound depends on engine specification, ECU calibration, vehicle condition and driving circumstances.

Why Upgrading Matters:

1. Improved Exhaust Flow

The Long Tube Street Headers use smooth-radius runners, port-matched flanges and optimised collectors.

Together with the high-flow catalytic converters and performance rear exhaust, these components are intended to improve the movement of exhaust gases.

2. Increased Performance Potential

SOUL Performance reports dynamometer testing of the combined system on a Porsche 987.2 Cayman S equipped with PDK transmission.

The manufacturer recorded maximum gains of approximately:

8 wheel horsepower. 11 lb-ft of torque.

These improvements were recorded around 4,100 RPM in the tested configuration.

The results depend on the vehicle, testing conditions and installed components and should not be presented as guaranteed gains.

3. Sharper Throttle Response

Improved exhaust gas flow may help the naturally aspirated flat-six engine respond more readily to accelerator input.

4. Enhanced Flat-Six Sound

The combination of long-tube headers and the valved rear exhaust produces a more pronounced engine soundtrack.

Drivers can select different exhaust sound characteristics according to preference.

5. Selectable Exhaust Volume

The vacuum-operated exhaust valves allow the driver to change between a refined and an aggressive exhaust setting.

This provides greater versatility than a permanently loud, non-valved system.

6. High-Flow Catalytic Converters

Unlike the catalyst-free Competition Package, the Street Package incorporates catalytic converters.

These are designed to reduce exhaust restriction while providing catalytic exhaust treatment.

Their presence does not automatically establish emissions or road-use compliance.

7. Reduced Unwanted Drone

The rear silencers are designed to minimise low-frequency cabin resonance.

This is particularly valuable during steady-speed driving.

8. Compatibility with Factory PSE

The system can be installed on vehicles with factory Porsche Sport Exhaust.

It is also suitable for non-PSE vehicles using the supplied SOUL valve controller.

9. Stainless Steel Durability

The T304L stainless steel headers and rear exhaust offer corrosion resistance and durability under high-temperature operating conditions.

10. Reinforced Exhaust Construction

The Valved Exhaust System incorporates reinforced silencer casings and strengthened mounting brackets to withstand exhaust vibration and thermal cycling.

11. Reduced Weight

SOUL reports that its Valved Exhaust System weighs approximately 5 lb less than the factory rear exhaust components.

The separately listed Street Headers also have a manufacturer-reported weight reduction.

These figures relate to the individual components and should not be presented as a verified complete-package weight saving without confirmation.

12. Premium Exhaust Tip Options

The package offers a selection of stainless steel and titanium exhaust tips.

This allows owners to customise the rear appearance of their vehicle.

13. Complete Integrated Exhaust Upgrade

The package combines the manufacturer's Long Tube Street Headers and Valved Exhaust System into one compatible exhaust solution.

14. Manufacturer Lifetime Warranty

SOUL Performance provides a lifetime warranty for its exhaust components, subject to the published warranty terms.