The Milltek Sport Turbo-Back range offers performance enhancements for turbocharged vehicle owners seeking to tune their vehicles. The system features an enlarged diameter throughout, improving gas-flow properties and reducing back pressure due to decreased restrictions. This results in a suitably aggressive exhaust sound. Eliminating the catalyst significantly enhances gas-flow and performance by removing the density that exhaust gases must pass through, adding notable horsepower. This system is designed for motorsport use only and requires a Stage 2 ECU remap. Fitting Notes: Propshaft requires removing and the engine subframe lowering to allow O.E part removal. - Enlarged diameter exhaust system for improved gas-flow - Reduces back pressure and restrictions - Designed for motorsport use only - Requires Stage 2 ECU remap Specifications: - Pipe Diameter: 76.20 mm - Fitting Time: 4 to 5 hours (including removing OE system) - Race Product: Yes - EMarked: No Kit comes with: - 100mm Hi-Flow Turbo Elbow - MSAU497 - Catalyst Bypass Pipe - MSAU498REP - Connecting Pipe - MSAU499 - Rear Silencer - MSAU500 Vehicle Compatibility: - 2009-2014 Audi TT Mk2 TT RS Coupe 2.5-litre TFSI quattro - 2009-2014 Audi TT Mk2 TT RS Roadster 2.5-litre TFSI quattro