Porsche 718 GT4 RS / Spyder RS SOUL Street Package

Product Description

SOUL Performance Products' Street Package combines its free-flowing Over Axle Pipes with the Valved Exhaust System to transform the sound and exhaust flow of the Porsche 718 Cayman GT4 RS and 718 Spyder RS while retaining the ability to significantly reduce volume when desired.

The factory exhaust contains several restrictions downstream of the engine, including the over-axle assemblies and the undersized rear muffler originally developed around the standard GT4 platform. SOUL replaces these components with an exhaust system engineered around a full 3-inch flow path when equipped with SOUL exhaust tips.

At the rear of the vehicle, SOUL's Valved Exhaust System uses a bespoke X-pipe design to produce a smoother, higher-pitched motorsports-inspired tone with the valves open. With the valves closed, exhaust is routed through a secondary muffled flow path incorporating Helmholtz and anti-drone features to substantially reduce exterior volume and cabin resonance.

The Street Package can be configured with either Competition or Resonated Over Axle Pipes. Competition OAPs provide the greatest overall sound level and lowest restriction, while Resonated OAPs smooth the exhaust tone and further reduce lower-RPM resonance for a more refined overall system.

For owners looking for a significant increase in GT3-derived flat-six sound without sacrificing the ability to cruise comfortably, the Street Package provides both aggressive valves-open character and a considerably quieter valves-closed mode.

Fitment

Fits:

• Porsche 718 Cayman GT4 RS – 2022+

• Porsche 718 Spyder RS – 2024+

Compatible with factory or upgraded headers.

Excludes GT4 RS Clubsport models.

Package Includes

• SOUL Valved Exhaust System

• Choice of SOUL Competition or Resonated Over Axle Pipes

• Choice of OAP heat solution

• Choice of SOUL exhaust tips or reuse of factory Porsche tips

• New high-grade installation hardware

Over Axle Pipe Options

Competition Over Axle Pipes

The Competition OAP configuration is designed for customers looking for the most aggressive sound and lowest restriction from the Street Package.

• Non-resonated design

• Removes the factory secondary catalytic elements and particulate-filter chambers

• Full 3-inch exhaust flow path

• Greater overall sound level with the valves open

• More aggressive exhaust character

• Approximately 11.65 lbs compared with approximately 25 lbs for the factory OAPs

• Approximately 13.3 lbs of weight savings

Resonated Over Axle Pipes

The Resonated OAP configuration provides the same freer-flowing architecture while incorporating resonators to further control sound quality and undesirable frequencies.

• Integrated resonators

• Removes the factory secondary catalytic elements and particulate-filter chambers

• Full 3-inch exhaust flow path

• Smoother and more refined exhaust tone

• Reduced lower-RPM resonance

• Slightly lower overall volume than Competition OAPs

• Approximately 16.75 lbs compared with approximately 25 lbs for the factory OAPs

• Approximately 8.25 lbs of weight savings

Valved Exhaust Operation

Valves Open

• Full 3-inch high-flow pathway

• X-pipe exhaust design

• Smooth, higher-pitched motorsports-inspired exhaust note

• Significantly increased exterior volume

• Maximum sound and exhaust flow

Valves Closed

• Exhaust routed through the secondary muffled flow path

• Reduced exterior sound level

• Reduced interior resonance

• Helmholtz characteristics target undesirable frequencies

• Anti-drone design developed around the low-to-mid RPM range

• Designed to provide a considerably more comfortable cruising experience

Heat Management

The GT3-derived 4.0-liter engine used in the GT4 RS and Spyder RS generates substantial exhaust heat, particularly around the tightly packaged Over Axle Pipe section.

SOUL strongly recommends its thermal-management solution to help reduce radiant heat transfer to nearby components and bodywork.

The Street Package can be ordered with either non-heat-shielded Over Axle Pipes or SOUL's optional heat solution.

Exhaust Tip Options

Slash Cut Double Wall

SOUL's traditional performance exhaust tip design with double-wall construction and a full-size outlet engineered around the 3-inch exhaust system.

Available in:

• Signature Satin

• Matte Black

Weissach

A motorsports-inspired stainless-steel tip design influenced by the factory Weissach-style outlets while maintaining the larger flow area of SOUL's exhaust system.

Available in:

• Signature Satin

• Matte Black

Reuse OEM

The factory Porsche exhaust tips can also be retained for an OEM appearance.

The factory tips use a smaller inlet diameter, requiring the SOUL exhaust to neck down at the outlet. This creates an additional restriction compared with SOUL's full-size Slash Cut Double Wall or Weissach tips.

Details

• Complete Over Axle Pipe and valved rear exhaust package

• Choice of Competition or Resonated Over Axle Pipes

• Full 3-inch exhaust pathway when used with SOUL exhaust tips

• Bespoke X-pipe architecture

• Distinct valves-open and valves-closed sound characteristics

• Helmholtz and anti-drone design features

• Targets drone frequencies in the low-to-mid 2,000 RPM range

• Competition OAP configuration provides maximum Street Package volume

• Resonated OAP configuration provides a smoother, more refined tone

• Optional OAP heat solution

• Constructed from thick-wall 0.065-inch T304L stainless steel

• Mandrel-bent tubing

• Back-purged TIG-welded construction

• Precision water-jet-cut brackets

• Components manufactured to ISO 9001:2015 standards

• Tolerances of approximately ±0.003 inch

• Fixture-built to maintain dimensional accuracy during welding

• New high-grade installation hardware included

• Designed and built in-house in Willow Grove, Pennsylvania

• Backed by SOUL Performance Products' Lifetime Warranty for street and track use

Check Engine Light Notice

When installed as a cat-back system with the factory catalytic headers retained, the Street Package does not trigger a check engine light on North American-market vehicles.

European-market vehicles require ECU tuning.

The Competition and Resonated Over Axle Pipes remove downstream secondary catalyst/filter assemblies, but they do not remove the monitored primary catalytic converters contained within the factory headers.

If the vehicle is also fitted with catless Competition Headers, a check engine light should be expected unless the vehicle is appropriately calibrated.