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 range is continually developed to suit an expanding selection of vehicles, with all products made in the UK and distributed globally. - 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 worldwide Specifications: - Pipe Diameter: 70.00 - Fitment Time: 2 to 2.5 hours (including removing OE system) - Race Product: No - EMarked: Yes - EMark Number: AudiRS4RSB9 Kit comes with: - LH Lower Downpipe - MSAU723 - RH Lower Downpipe - MSAU724 - Front Silencer - MSAU726 - Centre Silencer - MSAU727 - LH Rear Silencer (ECE) Valved - MSAU730 - RH Rear Silencer (ECE) Valved - MSAU731 - Cerakote Black 170 x 107 Exhaust Tip, LH - MSTIP248 - Cerakote Black 170 x 107 Exhaust Tip, RH - MSTIP249 Vehicle Compatibility: - Audi RS4 B9 2.9 V6 Turbo Avant (Non OPF/GPF Models) 2018 and later