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. Manufactured from 304L aircraft grade stainless steel, these systems are built to withstand harsh conditions. All products are made in the UK and distributed globally, supporting a wide range of vehicles. - Direct replacement for the original exhaust system - Available in multiple configurations for sound customization - Constructed from 304L aircraft grade stainless steel - Designed and manufactured in the UK Specifications: - Pipe Diameter: 70.00 - Installation Time: 2 to 2.5 hours (including removal of 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 - Brushed Titanium Jet (Oval) 170 x 107 Exhaust Tip - MSTIP259 - Brushed Titanium Jet (Oval) 170 x 107 Exhaust Tip - MSTIP260 Vehicle Compatibility: - Audi RS4 B9 2.9 V6 Turbo Avant (Non OPF/GPF Models) 2018 and later