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 - Constructed from 304L aircraft grade stainless steel - Designed and manufactured in the UK Specifications: - Pipe Diameter: 0.00 - Race Product: No - EMarked: Yes - EMark Number: audia4b9 Kit comes with: - Front Connecting Pipe - MSAU683 - Front Silencer - MSAU684 - Centre Silencer - MSAU685 - Y Pipe - MSAU686 - LH Rear Silencer - MSAU687 - RH Rear Silencer - MSAU688 - LH Silencer Mounting Bracket - MSAU689 - RH Silencer Mounting Bracket - MSAU690 - Burnt Titanium GT (round) 100 Exhaust Tip, Standard - MSTIP194 Vehicle Compatibility: - Audi A4 2.0 TFSI B9 Quattro Saloon & Avant (Non OPF/GPF Models including Mild Hybrid & Without Brace Bars) 2016 and later