With the true gear head in mind Billy Boat Performance Exhaust developed this 3” down pipe for the Audi TT225 as a bolt on upgrade for their 3” cat back. Hand fabricated from 100% T304 stainless steel, CNC mandrel bent 3” tubing and a 200 cell metal matrix high flow catalytic converter this full 3” system will release the power any engine and turbo can produce. As with all B&B products this down pipe is back with their limited LIFETIME warranty. *THESE UNITS ARE DESIGNED FOR OFF-HIGHWAY RACING ONLY AND SHOULD NOT BE USED ON PUBLIC ROADS*