http://www.sharkwerks.com – The Shark Werks Cayenne TT Bypass Exhaust replaces the existing OEM secondary catalytic converters. The OEM Cayenne exhaust system has four catalytic converters: the secondary cats are primarily to reduce noise. The horsepower benefits are significant when eliminating the secondary cats. Using stainless steel materials and a CNC mandrel tube bender, we created a pair of single-piece, high-flow pipes. We created an analog to the OEM system that uses OEM-sized diameter tubing and a factory fit flange for installation. The result is a sporty sound without resonance or drone, more horsepower, and reduced turbo lag (on Turbo models). We also made an extra effort to use the OEM catalyst mounts by designing compatible hangers.