The Cat-Back systems are designed as direct replacements for the original exhaust, offering improvements in sound and aesthetics. Multiple configurations are available, allowing the owner to select the desired exhaust volume and tone. All products are manufactured from 304L aircraft grade stainless steel, ensuring durability in harsh conditions. These performance exhaust systems are developed for a wide range of vehicles, with ongoing research and development to meet performance exhaust requirements. All products are made in the UK and distributed to over 90 countries worldwide. - Direct replacement for the original exhaust system - Available in multiple configurations for sound and tone customization - Manufactured from 304L aircraft grade stainless steel - Made in the UK and distributed globally Specifications: - Pipe Diameter: 70.00 - Installation Time: 2 to 2.5 hours (including removal of OE system) - Race Product: No - EMarked: No Kit comes with: - MSAU723: LH Lower Downpipe - MSAU723 - MSAU724: RH Lower Downpipe - MSAU724 - MSAU726REP: Front Silencer Delete Pipe - MSAU726REP - MSAU727REP: Centre Silencer Delete Pipe - MSAU727REP - MSAU730: LH Rear Silencer (ECE) Valved - MSAU730 - MSAU731: RH Rear Silencer (ECE) Valved - MSAU731 - MSTIP248: Cerakote Black Black 170 x 107 Exhaust Tip, LH - MSTIP248 - MSTIP249: Cerakote Black Black 170 x 107 Exhaust Tip, RH - MSTIP249 Vehicle Compatibility: - 2018 and later Audi RS4 B9 2.9 V6 Turbo Avant (Non OPF/GPF Models)