SOUL Street Exhaust Package, Polished Chrome Tips. Porsche 981 GT4 / Boxster Spyder / Clubsport › POR.GT4.STPKG.POT

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.