The Soul Performance Muffler Bypass Pipes - POR9971MBPBPOL are aftermarket exhaust components designed to replace the factory mufflers on a Porsche 997. They are made from high-quality T304L stainless steel and feature mandrel-bent tubing for optimal flow and performance. These bypass pipes are designed to increase exhaust flow, reduce back pressure, and enhance the overall sound of the vehicle. They are a direct bolt-on replacement for the factory mufflers and do not require any modifications for installation. The Soul Performance Muffler Bypass Pipes are a popular choice for enthusiasts looking to improve the performance and sound of their Porsche 997.