The Cat-Back systems are designed as direct replacements for the original exhaust, offering improved sound and aesthetics. Multiple configurations are available, allowing the owner to select the desired increase in exhaust volume or a more aggressive tone. All products are manufactured from 304L aircraft grade stainless steel, ensuring durability in harsh conditions. The performance exhaust systems are developed for a wide range of vehicles, with ongoing research and development to meet performance exhaust requirements. - Direct replacement for the original exhaust system - Available in multiple configurations for sound and tone customization - Manufactured from 304L aircraft grade stainless steel - Designed for a wide range of vehicles 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 - MSTIP246: Polished Jet (oval) 170 x 107 Exhaust Tip, LH - MSTIP246 - MSTIP247: Polished Jet (oval) 170 x 107 Exhaust Tip, RH - MSTIP247 Vehicle Compatibility: - 2018 and later Audi RS4 B9 2.9 V6 Turbo Avant (Non OPF/GPF Models)