Milltek Sport Large-Bore Downpipes are designed to improve both performance and sound. These downpipes feature a larger diameter compared to standard OEM parts, allowing more exhaust gas to exit the engine and pass through, which increases efficiency. When used with the Catalyst Bypass Pipe, significant power gains can be achieved without the restriction caused by a catalyst. This product is intended for motorsport use only and requires a Stage 2 ECU remap. - Larger diameter than OEM for increased gas flow - Designed to improve performance and sound - Motorsport use only; requires Stage 2 ECU remap Specifications: - Pipe Diameter: 76.20 - Race Product: Yes - EMarked: No Kit comes with: - Catalyst Bypass Pipe - MSAU680REP - Downpipe Turbo Elbow - MSAU717 Vehicle Compatibility: - Audi RS3 Saloon / Sedan 400PS (8V MQB) - Non-OPF/GPF Models 2017 and later - Audi RS3 Saloon / Sedan 400PS (8Y MQB EVO) - Non-OPF/GPF Models 2022 and later - Audi RS3 Sportback 400PS (8V MQB - Facelift Only) - Non-OPF/GPF Models 2017-2018 - Audi TT Mk3 TTRS 2.5TFSI Quattro (Non-OPF/GPF Models) 2016 and later