Flat 6 Motorsports Over Axle Pipes - OAP (718 GT4 / Spyder / GTS 4.0)

2021-06-15T14:06:32-04:00

Vendor: Flat 6 Motorsports
Type: Exhaust
Price: 1749.00 - 2495.00 (2 variants)

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

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.

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.

Installation Instructions

Dyno Plots

2022 Cayman GT4 w/ Stock Headers & Stock Muffler

2020 Cayman GT4 w/ Stock Headers & Stock Muffler

2020 Cayman GT4 w/ Soul Competition Headers & Stock Muffler

Video