Designed to Fit

2020+ Porsche Cayman GT4 / GTS 4.0 (718)
2020+ Porsche Boxster Spyder / GTS 4.0 (718)

Note - These are designed for North American market vehicles.

Product Details

The Flat 6 Motorsports Over Axle Pipes (OAPs) for the 718 GT4 and also compatible with the GTS 4.0, provide a high flow and smoothed exhaust flow design. These are a direct factory replacement and bolt on solution, making it an easy to do install for most skill levels.

The Flat 6 Motorsports over axle exhaust pipes are engineered to provide optimal flow and maximum performance. Our GT4 over axle pipes are made from T-304 Stainless Steel or optional Titanium and feature a proprietary heat-shielding technology to insulate heat inside of the piping. This dramatically reduces heat transfer to key components like rear brake lines, axles and suspension. The OAPs are meticulously TIG welded for a high quality finish and lifelong durability.

Features

Direct Factory Replacement
Significant Exhaust Flow Rate Enhancement
25+ HP Gains
Weight reduction of 18lbs in Titanium or 11lbs in Stainless Steel compared to the factory pipes
Improved Sound
Easy to Install
Includes New High-Grade Stainless Bolts & Locking Nuts

Confirmed Compatibility

OEM Muffler
Akrapovic Muffler
Cargraphic Muffler/Systems
Fabspeed Exhaust System
Kline Innovation Muffler
Soul Performance Valved Muffler
JCR Valved Muffler
Valvetronic Desings Muffler

Engineered

Porsche redeveloped the entire exhaust system from the previous 981 GT4 when they developed the new 4.0L powerplant and had to incorporate a modular design for various global emission requirements. This led to a factory over axle pipe that provided massive restriction.

F6 OAP 3D Model

After studying and analyzing this design, Flat 6 Motorsports developed a solution that utilized the factory concept but enhanced the bends and eliminated restrictive elements of the factory design. We achieved this by utilizing 2.5" tubing with smoothed mandrel bends. Replacing the restrictive factor canister with a smooth flowing staggered Y-pipe design ensures optimum exit flow to the muffler section. Advanced simulation software showed this design to most efficiently distribute exhaust flow.

Materials

We chose to use proven high-grade materials including T-304 Stainless Steel or optional Titanium and an advanced proprietary heat shield that is welded and integrated to the piping. This provides great structural integrity while reducing weight and limiting heat transfer from the piping. The increased flow and reduction in restriction also lowers exhaust gas temperatures (EGT).

Installation

We include the high-grade stainless steel hardware to make this job a simple DIY for consumers who are comfortable installing exhaust work. This is a direct factory replacement and can be installed in less than 2 hours.