The SOUL Race Exhaust System is the most comprehensive exhaust upgrade downstream of the headers for the naturally aspirated Porsche 718 GT4, Spyder, and GTS 4.0. Rather than replacing only the factory rear muffler or over-axle pipes, this system replaces the complete exhaust path after the headers with a free-flowing 2.5-inch system engineered around maximum flow, substantial weight reduction, and a more aggressive motorsport-inspired exhaust note.
The factory exhaust uses separate over-axle pipes and PSE rear muffler assemblies connected through restrictive 2.25-inch inlet and outlet flanges. SOUL eliminates that interface entirely, maintaining a larger 2.5-inch exhaust path on each side of the vehicle. Longer tubing runs and a purpose-designed X-pipe blend the two banks to create a smoother, higher-pitched flat-six tone reminiscent of earlier naturally aspirated Porsche GT cars.
Two sound configurations are available. The Non-Resonated system is the lightest and most aggressive option, designed for drivers prioritizing maximum sound and weight reduction. The Resonated system incorporates durable race resonators and dedicated drone canisters to refine the exhaust note and reduce cabin resonance while retaining the character and increased flow of the complete Race Exhaust.
SOUL reports independent Dynojet testing performed by Jotech Motorsports on a 718 GT4 showing peak gains of 30.7 wheel horsepower and 16.1 lb-ft of torque, with the gains carrying toward redline. Actual results will vary based on vehicle, conditions, fuel, and additional modifications. SOUL notes that ECU calibration may further take advantage of the increased exhaust flow.
This DasMotoring configuration is designed to reuse the factory Porsche exhaust tips.
DETAILS:
Fits North American Porsche 718 Cayman GT4, 718 Spyder, Cayman GTS 4.0, and Boxster GTS 4.0 models (2020+)
Complete exhaust system downstream of the headers, replacing both the factory over-axle pipes and rear muffler assembly
Maintains a 2.5-inch exhaust path on each side rather than the factory system's restrictive 2.25-inch connecting flanges
Purpose-designed X-pipe blends the two exhaust banks for a smoother, higher-pitched flat-six exhaust note
Available in Resonated and Non-Resonated configurations
Non-Resonated configuration prioritizes maximum sound and minimum weight
Resonated configuration incorporates race resonators and drone canisters to refine sound and reduce cabin resonance
Designed to reuse the factory Porsche exhaust tips
No Check Engine Light on North American vehicles
Non-Resonated system weighs approximately 27.5 lbs, saving approximately 29.9 lbs / 13.5 kg compared with the 57.4-lb factory components
Resonated system weighs approximately 39.35 lbs, saving approximately 18.05 lbs / 8.2 kg compared with the factory components
Independent Dynojet testing on a 718 GT4 showed peak gains of 30.7 whp and 16.1 lb-ft of torque
Constructed from mandrel-bent .065-inch-wall T304L stainless steel tubing
Back-purged TIG welded for proper penetration, strength, and long-term durability
Precision water-jet-cut flanges manufactured to approximately ±0.003-inch tolerances
Fabricated in dedicated thick-gauge fixtures to control heat distortion and maintain accurate fitment
Includes new high-grade installation hardware and four OEM Porsche gaskets
Backed by SOUL Performance Products' Lifetime Warranty for both street and track use
Designed and manufactured in-house at SOUL Performance Products in Willow Grove, Pennsylvania
NOTE: European-market vehicles use a different exhaust mounting configuration. A European conversion kit is required; European customers should confirm compatibility before ordering.
RACE EXHAUST VS. RACE X-PIPE: The SOUL Race X-Pipe replaces only the factory rear muffler and connects to the existing over-axle pipes. The SOUL Race Exhaust System replaces the entire exhaust system downstream of the headers, eliminating the factory OAP-to-muffler connection and maintaining a larger 2.5-inch exhaust path throughout. Choose the Race Exhaust when maximum flow, weight reduction, and sound are the priority.
The SOUL Race Exhaust System is the most comprehensive exhaust upgrade downstream of the headers for the naturally aspirated Porsche 718 GT4, Spyder, and GTS 4.0. Rather than replacing only the factory rear muffler or over-axle pipes, this system replaces the complete exhaust path after the headers with a free-flowing 2.5-inch system engineered around maximum flow, substantial weight reduction, and a more aggressive motorsport-inspired exhaust note.
The factory exhaust uses separate over-axle pipes and PSE rear muffler assemblies connected through restrictive 2.25-inch inlet and outlet flanges. SOUL eliminates that interface entirely, maintaining a larger 2.5-inch exhaust path on each side of the vehicle. Longer tubing runs and a purpose-designed X-pipe blend the two banks to create a smoother, higher-pitched flat-six tone reminiscent of earlier naturally aspirated Porsche GT cars.
Two sound configurations are available. The Non-Resonated system is the lightest and most aggressive option, designed for drivers prioritizing maximum sound and weight reduction. The Resonated system incorporates durable race resonators and dedicated drone canisters to refine the exhaust note and reduce cabin resonance while retaining the character and increased flow of the complete Race Exhaust.
SOUL reports independent Dynojet testing performed by Jotech Motorsports on a 718 GT4 showing peak gains of 30.7 wheel horsepower and 16.1 lb-ft of torque, with the gains carrying toward redline. Actual results will vary based on vehicle, conditions, fuel, and additional modifications. SOUL notes that ECU calibration may further take advantage of the increased exhaust flow.
This DasMotoring configuration is designed to reuse the factory Porsche exhaust tips.
DETAILS:
Fits North American Porsche 718 Cayman GT4, 718 Spyder, Cayman GTS 4.0, and Boxster GTS 4.0 models (2020+)
Complete exhaust system downstream of the headers, replacing both the factory over-axle pipes and rear muffler assembly
Maintains a 2.5-inch exhaust path on each side rather than the factory system's restrictive 2.25-inch connecting flanges
Purpose-designed X-pipe blends the two exhaust banks for a smoother, higher-pitched flat-six exhaust note
Available in Resonated and Non-Resonated configurations
Non-Resonated configuration prioritizes maximum sound and minimum weight
Resonated configuration incorporates race resonators and drone canisters to refine sound and reduce cabin resonance
Designed to reuse the factory Porsche exhaust tips
No Check Engine Light on North American vehicles
Non-Resonated system weighs approximately 27.5 lbs, saving approximately 29.9 lbs / 13.5 kg compared with the 57.4-lb factory components
Resonated system weighs approximately 39.35 lbs, saving approximately 18.05 lbs / 8.2 kg compared with the factory components
Independent Dynojet testing on a 718 GT4 showed peak gains of 30.7 whp and 16.1 lb-ft of torque
Constructed from mandrel-bent .065-inch-wall T304L stainless steel tubing
Back-purged TIG welded for proper penetration, strength, and long-term durability
Precision water-jet-cut flanges manufactured to approximately ±0.003-inch tolerances
Fabricated in dedicated thick-gauge fixtures to control heat distortion and maintain accurate fitment
Includes new high-grade installation hardware and four OEM Porsche gaskets
Backed by SOUL Performance Products' Lifetime Warranty for both street and track use
Designed and manufactured in-house at SOUL Performance Products in Willow Grove, Pennsylvania
NOTE: European-market vehicles use a different exhaust mounting configuration. A European conversion kit is required; European customers should confirm compatibility before ordering.
RACE EXHAUST VS. RACE X-PIPE: The SOUL Race X-Pipe replaces only the factory rear muffler and connects to the existing over-axle pipes. The SOUL Race Exhaust System replaces the entire exhaust system downstream of the headers, eliminating the factory OAP-to-muffler connection and maintaining a larger 2.5-inch exhaust path throughout. Choose the Race Exhaust when maximum flow, weight reduction, and sound are the priority.
