Milltek Sport Large-Bore Downpipes are designed to enhance both performance and sound. These downpipes feature a larger diameter compared to standard OEM parts, providing significantly more space for exhaust gases to exit the engine and pass through the system, which increases efficiency. The primary catalyst is removed from the exhaust system to create a freer-flowing exhaust, allowing the engine to operate more efficiently and improve performance. - Larger diameter than OEM for increased exhaust flow - Primary catalyst removed for improved efficiency - Designed to enhance both performance and sound Specifications: - Pipe Diameter: 76.20 - Race Product: Yes - EMarked: No Kit comes with: - MSAU663: LH 76mm Primary Cat Bypass Downpipe (fits LH Turbo) - MSAU663 - MSAU664: RH 76mm Primary Cat Bypass Downpipe (fits RH Turbo) - MSAU664 - MSAU665REP: LH Connecting Pipe to Milltek Catback - MSAU665REP - MSAU666REP: RH Connecting Pipe to Milltek Catback - MSAU666REP Vehicle Compatibility: - 2013-2018 Audi RS6 C7 4.0 TFSI biturbo quattro inc Performance Edition - 2013-2018 Audi RS7 C7 Sportback 4.0 V8 TFSI biturbo inc Performance Edition - 2012-2018 Audi S6 4.0 TFSI C7 quattro - 2012-2018 Audi S7 Sportback 4.0 TFSI quattro S tronic