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 increase in exhaust volume or a more aggressive tone. Constructed from 304L aircraft grade stainless steel, these systems are built to withstand harsh conditions. All products are manufactured in the UK and distributed to over 90 countries worldwide. - Direct replacement for the original system - Available in multiple configurations for sound and tone - Made from 304L aircraft grade stainless steel - Manufactured 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: AudiRS4RSB9 Kit comes with: - MSAU723: LH Lower Downpipe - MSAU723 - MSAU724: RH Lower Downpipe - MSAU724 - MSAU725: Front Silencer - MSAU725 - MSAU727: Centre Silencer - MSAU727 - 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: - Audi RS5 B9 2.9 V6 Turbo Coupe (Non OPF/GPF Models) 2017, 2019