The Scorpion Red Power Car Exhausts are packed with features... Specifications Include: Designed Specifically for the Audi A4 B9 2.0 TFSI Quattro 2016 - 2021 High Flow Sports Catalyst Downpipe Includes the following components: Downpipe with sports catalyst Fitting kit Pipe Diameter - 80mm (3.15") Tailpipe - N/A Fits To - OEM systems Red Power - Built to stir your soul! Warranty - All Scorpion exhausts come with a lifetime warranty, apart from high flow sports catalysts which come with a 2 year 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