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 to over 90 countries worldwide. - Direct replacement for the original exhaust system - Available in multiple configurations for sound and tone customization - Constructed 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 removing OE system) - Race Product: No - EMarked: Yes - EMark Number: RS4RS5OPF Kit comes with: - RH Lower Downpipe - MSAU724 - Front Silencer - MSAU726 - Centre Silencer - MSAU727 - LH Rear Silencer (ECE) Valved - MSAU730 - RH Rear Silencer (ECE) Valved - MSAU731 - LH Lower Downpipe - MSAU739 - Polished Jet (oval) 170 x 107 Exhaust Tip, LH - MSTIP246 - Polished Jet (oval) 170 x 107 Exhaust Tip, RH - MSTIP247 - Electronic Valve Motors - ACTUATOR01 Vehicle Compatibility: - Audi RS4 B9 2.9 V6 Turbo Avant (OPF/GPF Models) 2019 and Later