Manifold / Headers

SOUL Competition Headers. 

The SOUL Performance Competition Headers are premium aftermarket performance exhaust manifolds developed specifically for Porsche 987.1 Boxster and Cayman models manufactured between 2005 and 2008.

Fits:

• Porsche Boxster 987 2.7L 2005-08/08
• Porsche Boxster 987 S 3.2/3.4L 2005-08/08
• Porsche Cayman 2.7L 987C 2006-08
• Porsche Cayman S 3.4L 987C 2005-08    

Designed for Porsche's naturally aspirated flat-six engines, these headers replace the original exhaust manifold and primary catalytic converter assemblies with a high-flow stainless steel system intended for track and competition applications.

The original Porsche exhaust manifolds incorporate catalytic converters to treat exhaust emissions. Although essential for emissions control, these components can introduce resistance to exhaust gas flow.

SOUL Performance developed its Competition Headers to provide a less restrictive exhaust path using carefully engineered primary runners, smooth-radius bends and optimised collectors.

Manufactured from 14–16 gauge T304L stainless steel tubing, the headers provide corrosion resistance and durability under demanding exhaust operating temperatures.

Each header incorporates port-matched cylinder-head flanges to provide an accurate transition between the engine's exhaust ports and the primary tubes.

The primary runners are mandrel-bent to maintain a smooth internal gas path, while the collectors are designed to improve how the individual exhaust streams combine.

This construction aims to support improved exhaust scavenging, sharper throttle response and increased performance potential.

The removal of the factory catalytic converters also produces a more pronounced exhaust sound, allowing more of the engine's naturally aspirated flat-six character to be heard.

What This Product Does:
Exhaust headers collect combustion gases from the engine's cylinder heads and direct them towards the remainder of the exhaust system.

On the Porsche 987.1 Boxster and Cayman, the original exhaust manifolds incorporate primary catalytic converters.

The SOUL Competition Headers replace these assemblies with freer-flowing stainless steel pipework.

Their main functions include:

• Collecting exhaust gases: Direct spent combustion gases away from the cylinder heads.
• Improving exhaust flow: Provide smoother passages intended to reduce unnecessary restrictions.
• Supporting exhaust scavenging: Use primary runner and collector geometry to improve exhaust gas movement.
• Reducing exhaust restriction: Remove the original primary catalytic converters from the exhaust path.
• Supporting engine performance: Help the naturally aspirated flat-six engine breathe more efficiently.
• Enhancing throttle response: Support improved engine responsiveness during acceleration.
• Increasing performance potential: Provide an exhaust configuration suitable for performance-focused engine setups.
• Enhancing exhaust sound: Produce a louder and more pronounced flat-six soundtrack.
• Reducing exhaust assembly weight: Eliminate the heavy original primary catalytic converter assemblies.
• Supporting motorsport reliability: Replace factory manifold assemblies that have experienced cracking or catalyst core damage in competition use.
• Providing corrosion resistance: Use T304L stainless steel construction.
• Maintaining downstream connection: Attach to the compatible rear exhaust system.

Why Upgrading Matters:

1. Improved Exhaust Flow

The smooth-radius stainless steel runners and optimised collectors are designed to reduce unnecessary flow restriction.

This helps exhaust gases leave the cylinder heads more efficiently.

2. Reduced Backpressure

The headers eliminate the factory primary catalytic converters, removing a source of exhaust restriction.

This makes them suitable for legally permitted competition applications where emissions requirements differ from public-road use.

3. Increased Performance Potential

More efficient exhaust flow may support improved engine breathing and stronger performance.

Actual horsepower and torque gains depend on the engine, ECU calibration, rear exhaust system and other modifications.

No specific numerical performance gain is guaranteed.

4. Improved Throttle Response

Reduced exhaust restriction may help the engine respond more readily to accelerator input.

This can be particularly valuable during high-load driving and rapid acceleration.

5. Enhanced Flat-Six Exhaust Sound

The removal of the original catalytic converters allows more exhaust sound to pass through the system.

This produces a louder, more aggressive flat-six soundtrack.

The final sound depends on the installed rear exhaust.

6. Competition-Focused Durability

SOUL developed the headers partly to address cracking and catalyst core failures reported in Spec Cayman racing.

The stainless steel construction eliminates the primary catalytic converter core as a potential failure point.

7. Potential Weight Reduction

The Competition Headers replace the original manifold and catalytic converter assemblies with stainless steel headers.

SOUL identifies weight reduction as a benefit, although an exact verified weight saving is not provided in the main product specification.

8. High-Quality Stainless Steel Construction

T304L stainless steel offers corrosion resistance and durability under repeated exhaust temperature changes.

9. Direct Bolt-On Installation

The headers are designed for direct replacement of the compatible factory manifold assemblies.

Each set is fixture-tested before dispatch and supplied with fitting instructions.

10. Motorsport Applications

The headers were accepted under published 2020 PCA Spec Cayman competition regulations.

Drivers preparing vehicles for regulated competition must check the latest championship rules before ordering.

11. Manufacturer Lifetime Warranty

SOUL Performance provides a lifetime warranty for its headers, including track use, subject to the applicable warranty terms.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

POR.9871.COH

The product you are viewing cross references to these numbers

SOUL Competition Headers. 

The SOUL Performance Competition Headers are premium aftermarket performance exhaust manifolds developed 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  

Designed for Porsche's naturally aspirated 2.9-litre and 3.4-litre flat-six engines, these competition-specification headers replace the original exhaust manifold and catalytic converter assemblies with a high-flow stainless steel design.

The factory Porsche exhaust system is engineered to balance performance, emissions control, noise restrictions and everyday usability.

However, the original exhaust manifold and catalytic converter arrangement can restrict exhaust gas flow, particularly when the engine is operating under demanding conditions.

SOUL Performance developed its Competition Headers to provide a freer-flowing alternative for performance-focused and motorsport applications.

Each header incorporates 2-inch primary runners, smooth-radius tubing, port-matched cylinder-head flanges and optimised exhaust collectors.

These features are designed to improve exhaust gas movement, reduce unnecessary turbulence and support efficient engine breathing.

The headers are manufactured from T304L stainless steel, providing corrosion resistance and durability under repeated exposure to high exhaust temperatures.

Unlike SOUL Performance's separately available Long Tube Street Headers, the Competition Headers do not incorporate catalytic converters.

Removing the original catalytic converters reduces exhaust restriction and allows a more direct flow of exhaust gases towards the rear exhaust system.

The catalyst-free construction also produces a louder and more aggressive exhaust note, emphasising the naturally aspirated flat-six engine's distinctive character.

SOUL Performance developed the runner and collector dimensions specifically for the Porsche 987.2 platform, with particular attention to the 3.4L engine while maintaining compatibility with the 2.9L variants.

The manufacturer reports Dynojet testing on its Porsche Cayman S project vehicle equipped with PDK transmission and a SOUL Valved Exhaust System.

During testing, the combined configuration achieved maximum improvements of 9 wheel horsepower and 10 lb-ft of torque at approximately 4,100 RPM.

These figures relate to the tested configuration and should not be interpreted as guaranteed gains from installing the headers alone.

The Competition Headers also provide a weight reduction compared with the original exhaust manifold and catalytic converter assemblies.

SOUL states that its headers weigh approximately 19 lb, compared with 26 lb for the factory components, excluding installation hardware.

This represents a saving of approximately 7 lb (3.17 kg).

Every header set is quality-checked and tested in a fitting fixture before dispatch to ensure accurate installation.

The headers are designed for direct bolt-on installation and include high-grade hardware for the header-to-exhaust flange connections.

SOUL Performance also offers an optional copper header gasket set for installation.

Backed by the manufacturer's lifetime warranty, subject to the applicable terms, the SOUL Competition Headers are an attractive upgrade for Porsche enthusiasts seeking improved exhaust flow, enhanced engine response, reduced weight and a more pronounced exhaust sound.

What This Product Does:
Exhaust headers collect combustion gases from the engine's cylinder heads and direct them into the downstream exhaust system.

On the Porsche 987.2 Boxster and Cayman, the original exhaust manifold assemblies incorporate catalytic converters that reduce harmful exhaust emissions.

The SOUL Competition Headers replace these assemblies with stainless steel performance headers designed to reduce restriction.

Their primary functions include:

• Collecting exhaust gases: Direct combustion gases away from the engine's cylinder heads.
• Improving exhaust flow: Provide smoother internal gas passages to reduce unnecessary restrictions.
• Supporting exhaust scavenging: Use runner length, diameter and collector design to improve exhaust gas movement.
• Reducing exhaust restriction: Remove the factory catalytic converters from the primary exhaust path.
• Enhancing throttle response: Support more responsive engine behaviour during acceleration.
• Increasing performance potential: Help the naturally aspirated flat-six engine breathe more efficiently.
• Supporting mid-range performance: Use optimised runner geometry developed for the 987.2 engine family.
• Enhancing exhaust sound: Produce a louder and more aggressive flat-six exhaust note.
• Reducing exhaust component weight: Replace the original manifold and catalyst assemblies with lighter stainless steel headers.
• Supporting motorsport applications: Provide a high-flow exhaust arrangement for permitted track and competition use.
• Maintaining downstream exhaust connections: Attach to the original compatible or suitable aftermarket rear exhaust system.
• Providing durable construction: Use corrosion-resistant stainless steel suitable for elevated exhaust temperatures.

Why Upgrading Matters:

1. Improved Exhaust Gas Flow

The headers incorporate smooth-radius primary runners, port-matched flanges and optimised collectors.

These design features are intended to reduce unnecessary flow restriction and support efficient exhaust gas movement.

2. Reduced Exhaust Restriction

Removing the original catalytic converters eliminates a source of resistance in the primary exhaust path.

This creates a freer-flowing arrangement suitable for legally permitted motorsport applications.

3. Increased Performance Potential

SOUL Performance reports Dynojet testing on a Porsche 987.2 Cayman S with PDK transmission.

When paired with the manufacturer's Valved Exhaust System, the Competition Headers contributed to a tested configuration producing maximum gains of:

9 wheel horsepower. 10 lb-ft of torque.

These improvements were recorded at approximately 4,100 RPM.

Results will vary according to engine condition, ECU calibration, rear exhaust arrangement and other modifications.

No specific power gain is guaranteed for an otherwise standard vehicle.

4. Sharper Throttle Response

A freer-flowing exhaust arrangement can help the engine respond more readily to accelerator input.

This may be particularly noticeable during acceleration and mid-range engine operation.

5. Enhanced Flat-Six Exhaust Sound

The catalyst-free construction allows more exhaust sound to pass through the system.

This produces a stronger and more aggressive soundtrack, particularly when combined with a performance rear exhaust.

6. Reduced Exhaust Weight

SOUL Performance provides the following weight comparison:

Original factory manifold/catalyst assemblies: approximately 26 lb (11.79 kg). SOUL Competition Headers: approximately 19 lb (8.62 kg). Total saving: approximately 7 lb (3.17 kg).

These weights exclude installation hardware.

7. Durable Stainless Steel Construction

T304L stainless steel provides corrosion resistance and durability under demanding exhaust operating conditions.

The headers are designed to withstand repeated heating, cooling and vibration.

8. Optimised Runner and Collector Geometry

The 2-inch primary runners and optimised collectors are developed for the 987.2 engine characteristics.

This supports efficient gas movement and exhaust scavenging.

9. Direct Bolt-On Installation

The headers are designed for direct installation on compatible vehicles.

SOUL quality-checks each set and verifies fitment using a dedicated fixture.

10. Compatibility with Performance Exhaust Upgrades

The headers are designed to work with the manufacturer's Valved Exhaust System and appropriate downstream exhaust configurations.

They also form part of the SOUL Performance Competition Package.

11. Manufacturer Lifetime Warranty

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

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

POR.9872.COH

The product you are viewing cross references to these numbers

Porsche 981 Boxster / Cayman SOUL Long Tube Street Headers, (w/ HJS 200 cell catalytic converters).

The SOUL Performance Products Long Tube Street Headers are engineered with large-diameter, free-flowing catalytic converters and extended tube runners to deliver maximum gains in horsepower, throttle response, and the signature flat-six soundtrack. Enjoy noticeable performance improvements—without triggering a check engine light!

• Fits all Porsche 981 Cayman / Boxster vehicles (2013-2016)
•  Added performance without a check engine light
•  Direct bolt on installation – instructions included
•  All Soul Performance Products components are backed by a renowned Lifetime Warranty for both street and track use

DEVELOPMENT & TESTING:
Designed specifically for the Porsche 981 platform, these headers feature carefully sized 2” runners and optimized collectors to unlock maximum power from the 3.4L engine, while still delivering impressive gains for the 2.7L.

CONSTRUCTION:
Each header is handcrafted from T304L stainless steel and undergoes rigorous in-house quality checks. Key design elements—such as port-matched flanges, smooth-radius primary tubing, and precision collectors—work together to enhance exhaust flow and maximize performance.

BOLT-ON INSTALLATION:
Every set is fixture-tested for perfect fitment and securely foam-packed for safe delivery. Detailed instructions are included, making installation straightforward for most DIY enthusiasts. 

LIFETIME WARRANTY: 
Enjoy your SOUL exhaust components with confidence on both the street and track as they are covered by our Lifetime Warranty! Our team will quickly work with you to resolve any issues or answer any questions that you may have.

NOTE:
+ This product is not CARB certified and may not be legal for use on emissions controlled vehicles; intended for off road use only

NOTE:  Sports catalytic converters and bypass pipes do not have type approval and are not legally permitted for use on vehicles manufactured after 1st March 2001 in the United Kingdom. They are not MOT compliant and must not be used on public roads. These components are intended for race and track use only. If you are located outside the UK, please consult your local laws and regulations to ensure compliance.

Please note: This item is not a stock product. It is a special order part and once ordered with us is not subject to cancellation or return unless proven not fit for purpose or defected.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

POR.981.STH

The product you are viewing cross references to these numbers

SOUL Long Tube Street Headers.

The SOUL Performance Long Tube Street Headers are high-performance aftermarket exhaust manifolds 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  

Designed for the naturally aspirated 3.8L flat-six engine, these headers replace the original exhaust manifold and catalytic converter assemblies with a carefully engineered long-tube exhaust system incorporating high-flow catalytic converters.

The original Porsche exhaust system is designed to balance performance, emissions, noise restrictions and everyday usability.

SOUL Performance's long-tube headers are designed to improve exhaust flow and engine response by using longer, smoother exhaust runners and optimised collectors.

Each header assembly features 2-inch primary runners, smooth-radius tubing and port-matched mounting flanges to help exhaust gases flow efficiently from the cylinder heads.

The headers are constructed from T304L stainless steel, providing excellent corrosion resistance and durability under demanding exhaust operating conditions.

High-flow catalytic converters are incorporated into the system, allowing improved exhaust flow while retaining a catalytic treatment stage rather than adopting a fully decatted design.

The long-tube configuration is particularly beneficial on a high-revving naturally aspirated engine because exhaust gas velocity, pulse timing and collector design influence engine breathing and the delivery of power across the rev range.

SOUL Performance has developed this product to complement the characteristics of the Porsche 981 GT4 and Spyder's 3.8L engine.

The result is a performance-focused exhaust upgrade intended to improve throttle response, enhance high-RPM engine performance and produce a more pronounced flat-six exhaust note.

Unlike a complete exhaust replacement, these headers replace the exhaust manifold and catalyst sections while allowing the compatible downstream exhaust to remain in place.

The product is manufactured using precision fabrication methods and is checked in a dedicated fixture to maintain accurate installation fitment.

SOUL Performance supplies installation instructions and offers a manufacturer's lifetime warranty, subject to its published conditions.

Ideal for Porsche enthusiasts seeking improved engine response, stronger performance and a more engaging exhaust character, these Long Tube Street Headers provide a substantial upgrade to the factory exhaust manifold arrangement.

What This Product Does:
The exhaust headers collect combustion gases leaving the engine's cylinder heads and direct them into the remainder of the exhaust system.

In a naturally aspirated flat-six engine, the design of the exhaust runners and collectors can influence how efficiently exhaust gases leave the cylinders.

Reducing unnecessary restrictions and improving exhaust pulse behaviour can help the engine expel spent gases and prepare for the next intake and combustion cycle.

The SOUL Performance Long Tube Street Headers are designed to improve this process through their runner length, primary diameter and collector geometry.

Their main functions include:

• Collecting exhaust gases: Direct exhaust gases away from the engine's cylinder heads.
• Improving exhaust flow: Use smooth-radius tubing and optimised collectors to reduce unnecessary restrictions.
• Supporting exhaust scavenging: Help exhaust pulses travel through the runners in a more efficient manner.
• Improving throttle response: Support more responsive engine behaviour under acceleration.
• Increasing performance potential: Enable improved engine breathing, particularly at higher engine speeds.
• Enhancing exhaust sound: Produce a stronger, more distinctive flat-six exhaust character.
• Maintaining catalytic treatment: Incorporate high-flow catalytic converters in the exhaust path.
• Supporting high-RPM operation: Use runner and collector dimensions selected for the 3.8L GT4 engine.
• Maintaining downstream exhaust compatibility: Connect to the appropriate existing rear exhaust system.
• Providing durable exhaust construction: Use corrosion-resistant stainless steel designed for elevated temperatures.
• Supporting performance tuning: Provide improved exhaust flow that may complement a correctly developed ECU calibration.
• Enhancing driving engagement: Deliver a more pronounced engine response and soundtrack.
  
  

Why Upgrading Matters:
Replacing the original exhaust manifold and catalyst assemblies with SOUL Performance Long Tube Street Headers is primarily a performance-focused modification.

The upgrade is intended to improve exhaust efficiency, increase engine responsiveness and enhance the naturally aspirated Porsche flat-six soundtrack.

Improved Exhaust Flow

• The long-tube runners, smooth-radius bends and optimised collectors are designed to improve the movement of exhaust gases away from the cylinder heads.
• This helps reduce unwanted restrictions within the header assembly and supports more efficient engine breathing.

Increased Performance Potential

• SOUL Performance developed these headers specifically for the 3.8L engine used in the 981 Cayman GT4 and Boxster Spyder.
• The manufacturer reports independent Dyno Dynamics testing showing approximately 30 whp of improvement in a tuned configuration, including 12 whp of additional gain from the headers when tested after tuning.
• These results reflect the particular test vehicle and configuration. Individual results will vary.

Sharper Throttle Response

• Improved exhaust flow can contribute to more responsive engine behaviour, particularly when accelerating through the middle and upper engine speed ranges.

Enhanced Flat-Six Exhaust Sound

• The header design changes how exhaust gases travel through the system.
• This can produce a fuller, more pronounced and more sporting exhaust note.
• The final sound depends on whether the vehicle uses the original Porsche rear exhaust or another compatible aftermarket system.

High-Flow Catalytic Converter Design

• The integrated catalytic converters allow a performance-focused exhaust arrangement without removing the catalytic treatment stage entirely.
• Nevertheless, the manufacturer does not certify the product for all emissions-controlled road applications.

Stainless Steel Durability

• T304L stainless steel offers corrosion resistance and durability under repeated heating and cooling cycles.

Factory-Style Installation

• SOUL Performance designs these headers as a direct bolt-on replacement for the corresponding original exhaust manifold arrangement.
• No bespoke exhaust fabrication is advertised for a standard compatible installation, although access and removal of corroded hardware can make the work demanding.

Long-Term Performance Upgrade

• For Porsche owners seeking greater performance and a more distinctive driving experience, these headers offer an upgrade to a major part of the engine's exhaust system.

The product may also complement suitable ECU tuning and other performance exhaust modifications.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

POR.GT4.STH

The product you are viewing cross references to these numbers

SOUL Long Tube Street Headers.

The SOUL Performance Long Tube Street Headers are premium aftermarket performance exhaust manifolds developed specifically for Porsche 987.1 Boxster and Cayman models manufactured between 2005 and 2008.

Fits:

• Porsche Boxster 987 2.7L 2005-08/08
• Porsche Boxster 987 S 3.2/3.4L 2005-08/08
• Porsche Cayman 2.7L 987C 2006-08
• Porsche Cayman S 3.4L 987C 2005-08  

Designed for Porsche's naturally aspirated flat-six engines, these headers replace the original exhaust manifold and primary catalytic converter assemblies with a stainless steel long-tube design incorporating HJS 200-cell high-flow catalytic converters.

The factory Porsche exhaust system is engineered to balance engine performance, emissions requirements, manufacturing costs and everyday driving refinement.

SOUL Performance developed its Long Tube Street Headers to improve the efficiency of the exhaust gas path while retaining catalytic exhaust treatment.

Each header incorporates 1.75-inch primary runners, carefully developed collector geometry and merge spikes designed to create a smoother transition as exhaust gases combine.

The long-tube construction is engineered to improve exhaust scavenging and support more efficient engine breathing.

By improving the movement of exhaust gases away from the cylinder heads, the headers are intended to enhance throttle response, support engine performance and produce a more distinctive naturally aspirated flat-six soundtrack.

The system is manufactured from T304L stainless steel, offering corrosion resistance and durability under demanding exhaust temperatures.

Precision waterjet-cut mounting flanges provide accurate attachment to the cylinder heads, while the internal collector design helps minimise unnecessary turbulence.

A distinguishing feature of these headers is the use of HJS 200-cell high-flow catalytic converters.

These catalysts are designed to combine effective exhaust gas treatment with reduced flow restriction.

HJS uses a double-foil wound catalyst substrate construction intended to improve strength and durability under repeated thermal cycling.

SOUL states that these converters are capable of meeting Euro 3 emissions performance requirements and are designed to reduce the likelihood of triggering a catalyst-related engine warning light.

However, this manufacturer statement should not be interpreted as proof that the complete exhaust modification is certified or road legal for every vehicle and jurisdiction.

Each header set is manufactured and quality-checked at SOUL Performance's Willow Grove, Pennsylvania facility.

The assemblies are tested in a precision fixture to maintain fitment accuracy and prevent fabrication distortion.

The headers are designed as a direct bolt-on replacement for the corresponding factory components, with new high-grade hardware supplied for the header-to-exhaust flange connections.

Backed by SOUL Performance's lifetime warranty, subject to the manufacturer's conditions, these headers provide a performance-focused upgrade for Porsche owners seeking improved exhaust flow, sharper throttle response and a more engaging engine sound.

What This Product Does:
Exhaust headers collect spent combustion gases from the engine's cylinder heads and direct them into the downstream exhaust system.

The Porsche 987.1 Boxster and Cayman use naturally aspirated flat-six engines in which exhaust runner length, diameter and collector geometry can influence engine breathing and power delivery.

The SOUL Performance Long Tube Street Headers provide an alternative exhaust gas path using longer runners, optimised collectors and high-flow catalytic converters.

Their main functions include:

• Collecting exhaust gases: Direct gases away from the engine's cylinder heads.
• Improving exhaust flow: Provide smoother and more efficient gas passages.
• Supporting exhaust scavenging: Use long primary runners and collector geometry to encourage efficient exhaust pulse movement.
• Enhancing throttle response: Help the engine respond more effectively during acceleration.
• Supporting engine performance: Reduce unnecessary exhaust restriction.
• Improving exhaust pulse transition: Use merge spikes within the collectors to smooth gas flow.
• Retaining catalytic treatment: Incorporate HJS high-flow catalytic converters.
• Reducing catalyst restriction: Use 200-cell catalyst substrates designed for efficient gas movement.
• Enhancing exhaust sound: Produce a richer and more pronounced flat-six tone.
• Supporting high-temperature durability: Use T304L stainless steel construction.
• Maintaining downstream exhaust connections: Attach to compatible factory or aftermarket rear exhaust components.
• Preserving fitment accuracy: Use precision-cut flanges and fixture-tested construction.

Why Upgrading Matters:
1. Improved Exhaust Gas Flow

The long-tube runners and optimised collectors are designed to provide a smoother route for exhaust gases leaving the engine.

This helps reduce unnecessary restriction and supports efficient engine breathing.

2. Enhanced Throttle Response

Improved exhaust flow and scavenging can support more responsive engine behaviour.

Drivers may notice a more immediate engine response during acceleration, depending on the overall vehicle configuration.

3. Increased Performance Potential

SOUL Performance developed the header runner dimensions and collectors to help extract additional performance from the 987.1 flat-six engines.

The manufacturer specifically highlights benefits for the 3.4L engine and improvements for the 2.7L engine.

Specific horsepower or torque increases have not been established from the official product specification for every engine variant. No numerical gain should be guaranteed without appropriate dynamometer testing.

4. Enhanced Flat-Six Exhaust Sound

The header design changes the movement of exhaust pulses through the system.

This can produce a fuller, richer and more sporting engine note.

The final sound depends on the original or aftermarket rear exhaust fitted.

5. HJS High-Flow Catalytic Converters

The integrated 200-cell HJS catalysts are designed to retain exhaust gas treatment while reducing restriction.

This is a key distinction from catalyst-free competition headers.

6. High-Quality Stainless Steel Construction

The T304L stainless steel construction offers corrosion resistance and durability in high-temperature exhaust applications.

The components are designed to withstand repeated heating and cooling cycles.

7. Optimised Collector Geometry

SOUL incorporates merge spikes within the collectors to improve exhaust gas transition.

This helps reduce turbulence where the primary runners combine.

8. Precision Mounting Flanges

Waterjet-cut mounting flanges are designed to provide accurate fitment and secure attachment to the cylinder heads.

Correct flange alignment is essential for preventing exhaust leaks.

9. Direct Bolt-On Installation

The headers are developed for the original mounting arrangement of compatible Porsche 987.1 vehicles.

SOUL tests each set in a fitting fixture to maintain dimensional accuracy.

10. Long-Term Durability

The stainless steel construction and HJS catalyst design are intended to provide resistance to corrosion, thermal stress and repeated exhaust temperature changes.

11. Manufacturer Lifetime Warranty

SOUL Performance backs the headers with a lifetime warranty for street and track use, subject to its published warranty conditions.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

POR.9871.STH

The product you are viewing cross references to these numbers

SOUL Long Tube Street Headers.

The SOUL Performance Long Tube Street Headers are high-performance aftermarket exhaust manifolds developed 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  

Designed for the naturally aspirated 2.9-litre and 3.4-litre flat-six engines, these headers replace the original Porsche exhaust manifold and catalytic converter assemblies with a freer-flowing stainless steel design incorporating high-flow catalytic converters.

The factory exhaust system is engineered to balance performance, emissions control, noise regulations and everyday usability. SOUL Performance developed its Long Tube Street Headers to improve exhaust gas flow and enhance the engine's characteristic sound while retaining catalytic exhaust treatment.

Each header features 2-inch primary runners, carefully formed bends, port-matched mounting flanges and optimised exhaust collectors.

The long-tube design is intended to help exhaust gases leave the cylinder heads more efficiently, supporting improved engine breathing and throttle response.

The headers are manufactured from T304L stainless steel, providing corrosion resistance, strength and durability under demanding exhaust operating temperatures.

Large-diameter, free-flowing catalytic converters are incorporated into the assemblies to reduce exhaust restriction compared with the manufacturer's intended factory baseline while retaining a catalytic treatment stage.

Unlike catalyst-free Competition Headers, the SOUL Long Tube Street Headers maintain catalytic converters within the exhaust system.

They are specifically developed for the Porsche 987.2 platform, with the primary runner diameter and collector geometry selected to complement the performance characteristics of both the 2.9L and 3.4L engines.

SOUL Performance reports dynamometer testing on its project Cayman S equipped with PDK transmission and a compatible SOUL Valved Exhaust System.

The manufacturer recorded improvements in wheel horsepower and torque around 4,100 RPM, although the figures published in different sections of its product page vary.

In addition to improved exhaust flow, the headers are designed to produce a stronger, fuller and more distinctive flat-six exhaust note.

The final sound depends on the installed rear exhaust system, engine specification and driving conditions.

Each header assembly is quality-checked, tested in an installation fixture and supplied with fitting instructions.

New high-grade hardware for the header-to-exhaust flange connections is included.

SOUL Performance also offers an optional copper exhaust header gasket set for installation.

The system is designed as a direct bolt-on replacement for the compatible original exhaust manifold arrangement, without requiring bespoke fabrication in a standard installation.

Backed by the SOUL Performance lifetime warranty, subject to the manufacturer's conditions, these headers provide an attractive upgrade for enthusiasts seeking improved exhaust flow, enhanced throttle response and a more engaging engine soundtrack.

What This Product Does:
Exhaust headers collect combustion gases from the engine's cylinder heads and direct them towards the remainder of the exhaust system.

The Porsche 987.2 Boxster and Cayman use naturally aspirated flat-six engines, where efficient exhaust gas movement is important for engine breathing and power delivery.

The SOUL Long Tube Street Headers replace the original manifold and catalytic converter assemblies with longer primary runners and improved collector geometry.

Their main functions include:

• Collecting exhaust gases: Direct gases away from the engine's cylinder heads.
• Improving exhaust flow: Provide smoother internal passages to reduce unnecessary restriction.
• Supporting exhaust scavenging: Use runner length and collector design to encourage efficient exhaust pulse movement.
• Enhancing throttle response: Support improved engine responsiveness during acceleration.
• Increasing performance potential: Help the engine breathe more efficiently, particularly under load.
• Supporting mid-range performance: Provide an exhaust arrangement developed to improve torque delivery.
• Enhancing flat-six sound: Produce a fuller and more pronounced exhaust note.
• Retaining catalytic treatment: Pass exhaust gases through integrated high-flow catalytic converters.
• Reducing exhaust restriction: Use large-diameter catalysts and smooth-flowing tubing.
• Maintaining downstream connections: Connect to a compatible rear exhaust system.
• Providing durable construction: Use corrosion-resistant T304L stainless steel.
• Supporting performance modifications: Complement compatible rear exhaust upgrades and appropriate engine tuning.
  

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

POR.9872.STH

The product you are viewing cross references to these numbers

High performance stud + nut kits for the exhaust manifold to cylinder head for Porsche. Using titanium and Inconel alloy studs, aerospace lock nuts, and a well-thought and balanced combination of metals and plating/coatings, our fasteners will perform better than the traditional fastener. They will never oxidize, and hence will unscrew easily when required.

Novel ultra-high-performance product
• Use of Titanium Ti6Al4V technology
• Extreme perceived quality

Contains 18 x Studs, Nuts & Washers

Fits:
Porsche 996 Turbo / GT3 / GT2
Porsche 997 Turbo / GT3 / GT2
Porsche 997.2 ALL
Porsche 991 ALL
Porsche 992 ALL
Porsche 987 2009-12
Porsche 981
Porsche 718 GT4

Related reference numbers
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SL-TI-18

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