The Scorpion Red Power Car Exhausts are packed with features... Specifications Include: Designed Specifically for the BMW 3 Series F80 M3 2014 - 2018 Cat-Back SystemIncludes the following components: Left hand high flow sports catalyst section Right hand high flow sports catalyst section Front pipes Fitting kit Pipe Diameter - 70mm (2.75") 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