The Scorpion Red Power Car Exhausts are packed with features... Specifications Include: Designed Specifically for the Audi RS6 C7 4.0 TFSI Biturbo Quattro 2013 - 2018 Cat-Back System (Non-Resonated). Includes the following components: Non-resonated centre section L/H Rear link pipe R/H Rear link pipe L/H Rear silencer R/H Rear silencer Fitting kit (72 mm H/D clamp) Fitting instructions Pipe Diameter - 70 mm (2.75") Tailpipe - Uses OE tailpipes Fits To - OEM & Scorpion systems Red Power - Built to stir your soul! Warranty - All Scorpion exhausts come with a lifetime warranty British Manufactured - All Scorpion exhausts are hand crafted by Scorpion automotive engineers in Derbyshire, UK Fittings/Instructions - All Scorpion products are supplied with everything needed to fit and ride, along with parts drawings and picture instructions where necessary