The SOUL Sport Cat Over Axle Pipes are a high-flow catted over-axle upgrade for the Porsche 718 Cayman GT4 RS and 718 Spyder RS. This is an excellent option for owners who want more sound, better exhaust flow, and a more engaging driving experience while still retaining catalytic converters in the over-axle section.
On the GT4 RS and Spyder RS, SOUL chose not to build a catted header replacement. Instead, they developed a modular over-axle pipe with integrated high-flow catalytic converters. This allows the factory or upgraded headers to be paired with a freer-flowing catted over-axle section, creating a strong balance between performance, sound, and emissions-conscious design.
As a standalone upgrade, these Sport Cat Over Axle Pipes replace the factory empty particulate filter section and deliver a noticeable increase in sound and response. When paired with SOUL Competition Headers, they create a much more aggressive performance setup while still retaining a monitored catalytic converter.
Each set includes a heat solution as standard to help manage the additional heat generated by the catalytic converter core.
Fitment
Fits:
Porsche 718 Cayman GT4 RS
Porsche 718 Spyder RS
Compatible with factory or upgraded headers and factory or upgraded rear exhaust systems.
Does not fit 718 GT4 Clubsport models.
Key Features
SOUL part number: POR.718GT4RS.SOP
High-flow catted over-axle pipe upgrade
Designed specifically for the Porsche 718 GT4 RS and Spyder RS
Replaces the factory over-axle pipe / particulate filter section
Works with factory headers or SOUL Competition Headers
Works with factory or upgraded rear exhaust systems
Includes heat solution as standard
Weighs approximately 18.7 lb, compared with approximately 25 lb for the factory over-axle pipes
Saves approximately 6.3 lb / 2.86 kg compared with factory
Constructed from mandrel-bent .065" wall T304L stainless steel
Back-purged TIG welded for strength and longevity
Waterjet-cut flanges manufactured to ISO 9001:2015 standards
Includes new high-grade installation hardware
Designed and built in-house by SOUL Performance Products in Willow Grove, Pennsylvania
Backed by SOUL’s lifetime warranty
DasMotoring Notes
This is the right choice if you want a major sound and flow improvement but do not want to run fully catless over-axle pipes. For maximum sound and flow, consider the SOUL Competition Over Axle Pipes. For a more complete performance setup, pair these Sport Cat Over Axle Pipes with SOUL Competition Headers or choose the SOUL Sport Header Package.
SOUL states that North American cars are not expected to trigger a check engine light with this product. European-market cars require ECU tuning. Emissions requirements vary by state, country, and vehicle use, so please confirm local requirements before ordering.
The SOUL Sport Cat Over Axle Pipes are a high-flow catted over-axle upgrade for the Porsche 718 Cayman GT4 RS and 718 Spyder RS. This is an excellent option for owners who want more sound, better exhaust flow, and a more engaging driving experience while still retaining catalytic converters in the over-axle section.
On the GT4 RS and Spyder RS, SOUL chose not to build a catted header replacement. Instead, they developed a modular over-axle pipe with integrated high-flow catalytic converters. This allows the factory or upgraded headers to be paired with a freer-flowing catted over-axle section, creating a strong balance between performance, sound, and emissions-conscious design.
As a standalone upgrade, these Sport Cat Over Axle Pipes replace the factory empty particulate filter section and deliver a noticeable increase in sound and response. When paired with SOUL Competition Headers, they create a much more aggressive performance setup while still retaining a monitored catalytic converter.
Each set includes a heat solution as standard to help manage the additional heat generated by the catalytic converter core.
Fitment
Fits:
Porsche 718 Cayman GT4 RS
Porsche 718 Spyder RS
Compatible with factory or upgraded headers and factory or upgraded rear exhaust systems.
Does not fit 718 GT4 Clubsport models.
Key Features
SOUL part number: POR.718GT4RS.SOP
High-flow catted over-axle pipe upgrade
Designed specifically for the Porsche 718 GT4 RS and Spyder RS
Replaces the factory over-axle pipe / particulate filter section
Works with factory headers or SOUL Competition Headers
Works with factory or upgraded rear exhaust systems
Includes heat solution as standard
Weighs approximately 18.7 lb, compared with approximately 25 lb for the factory over-axle pipes
Saves approximately 6.3 lb / 2.86 kg compared with factory
Constructed from mandrel-bent .065" wall T304L stainless steel
Back-purged TIG welded for strength and longevity
Waterjet-cut flanges manufactured to ISO 9001:2015 standards
Includes new high-grade installation hardware
Designed and built in-house by SOUL Performance Products in Willow Grove, Pennsylvania
Backed by SOUL’s lifetime warranty
DasMotoring Notes
This is the right choice if you want a major sound and flow improvement but do not want to run fully catless over-axle pipes. For maximum sound and flow, consider the SOUL Competition Over Axle Pipes. For a more complete performance setup, pair these Sport Cat Over Axle Pipes with SOUL Competition Headers or choose the SOUL Sport Header Package.
SOUL states that North American cars are not expected to trigger a check engine light with this product. European-market cars require ECU tuning. Emissions requirements vary by state, country, and vehicle use, so please confirm local requirements before ordering.
