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 combined with the Hi-Flow Sports Cat, a significant increase in performance and a noticeable change in sound can be expected. Stage 2 ECU Remap Required. - Large diameter for increased exhaust flow - Designed to enhance both performance and sound - Requires Stage 2 ECU remap Specifications: - Pipe Diameter: 76.20 - Race Product: Yes - EMarked: No Kit comes with: - MSAU680: High Flow 200cpsi Cat Assembly - MSAU680 - MSAU717: Downpipe Turbo Elbow - MSAU717 Vehicle Compatibility: - 2017 and later Audi RS3 Saloon / Sedan 400PS (8V MQB) - Non-OPF/GPF Models - 2022 and later Audi RS3 Saloon / Sedan 400PS (8Y MQB EVO) - Non-OPF/GPF Models - 2017-2018 Audi RS3 Sportback 400PS (8V MQB - Facelift Only) - Non-OPF/GPF Models - 2016 and later Audi TT Mk3 TTRS 2.5TFSI Quattro (Non-OPF/GPF Models)