The downpipes are handmade in Taiwan. The tubing, flange and hangers are made from 304 stainless steel with a brushed matte finish. we use a 2.5" tube which mates up to the factory 2.5” down pipe, then to the factory 2.25" exhaust. The flanges are 0.25 inch 304 stainless steel and were CAD designed to match factory specs and are precision cut with a 55,000 PSI water jet. The entire downpipe is purge tig welded. We incorporate stainless steel flex braid exhaust tubing, which is similar in design to the factory setup.

The Thunder's 955 CAYENNE Down Pipes are one of the easiest ways to unlock restricted horsepower from your turbo engine. It has been designed to allow maximum flow exiting the exhaust side of the turbo.

The Thunder's 955 CAYENNE Down Pipes have a enlarged pipe diameter in order to allow gasses leaving the turbo to flow at a more rapid rate than the restrictive OEM down pipe. This improved exhaust flow will result in more horsepower and torque by allowing the turbo to spool quicker and stronger. This also allows the turbo to work more efficiently with full boost being achieved lower in the RPM curve than before.

Made from high quality stainless steel to resist corrosion and mandrel bent to ensure a smooth flowing surface, the Thunder's 955 CAYENNE Down Pipes will bolt directly to the OEM turbo using existing hardware for a factory-like fit. The down pipe incorporates bungs for existing OEM sensors to retain proper engine management.