The MILLTEK SSXAU218 cat-back exhaust system is designed as a direct replacement for the factory exhaust on the Audi RS4 (B7) 4.2 V8 Saloon, Avant, and Cabriolet (2006–2008). It is developed to enhance exhaust sound and rear-end appearance, with configuration options intended to adjust overall volume and deliver a more pronounced tone. Manufactured from 304L aircraft-grade stainless steel, the system is built for long-term durability and resistance to harsh operating conditions. The rear section is finished with Satin Sheen Black Tip outlets to match the specified tip style. - Cat-back configuration engineered as a direct replacement for the original exhaust system - Designed to improve exhaust sound character and visual presence - 304L aircraft-grade stainless steel construction for corrosion resistance and service life - Multiple configuration concept intended to vary exhaust volume and tone - Satin Sheen Black Tip finish to match the listed tailpipe style Specifications: - EC Approved: No - Pipe Size: 60 mm - Race System: No - Valvesonic: No - Fitting Time: 1.50 to 2.00 hours - Tip Style: Satin Sheen Black Tip Satin Sheen Black Tip - Type: Cat-back - Vehicle Make: Audi - Vehicle Model: RS4 - Vehicle Variant: B7 4.2 V8 Saloon, Avant and Cabriolet