The Scorpion Red Power Car Exhausts are packed with features... Specifications Include: Designed Specifically for the Audi TT RS MK2 2009 - 2014 Scorpion Car Exhaust Hi-Flow Sports De-Cat Downpipe includes the following components: Primary de-cat downpipe Secondary sports catalyst Pipe Diameter - 90 mm (3.55") 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