Milltek Sport Large-Bore Downpipes are designed to enhance 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 improved gas flow - Designed for motorsport applications - Requires Stage 2 ECU remap - Made in the UK Specifications: - Pipe Diameter: 76.20 - Race Product: Yes - EMarked: No Kit comes with: - MSAU717: Downpipe Turbo Elbow - MSAU717 - MSAU736REP: Cat & OPF/GPF Bypass Assembly - MSAU736REP Vehicle Compatibility: - 2019 and later Audi RS3 Saloon / Sedan 400PS (8V MQB) - OPF/GPF Models - 2021 and later Audi RS3 Saloon / Sedan 400PS (8Y MQB EVO) - OPF/GPF Models - 2019 and later Audi RS3 Sportback 400PS (8V MQB - Facelift Only) - OPF/GPF Models - 2021 and later Audi RS3 Sportback 400PS (8Y MQB EVO) - OPF/GPF Models - 2020 and later Audi RSQ3 2.5T Sportback & SUV (OPF/GPF Equipped Models Only) - 2019 and later Audi TT Mk3 TTRS 2.5TFSI Quattro (OPF/GPF Models)