The new CNT Racing cat-back exhaust system for the R56 MINI Cooper S is one of the highest quality and best sounding exhausts on the market for the R56. It features dual tips and 2.5" piping to guarantee free exhaust flow through your turbo Mini. It's designed to bolt up to the stock downpipe and eliminates the second cat. All necessary hardware and gaskets are included. Note will not fit R52 05-08 Mini Cooper Cabrio S and will not fit R57.Fits 2007-2013 Cooper S R56Fits 2009-2013 JCW Hardtop R56Fits 2011+ Cooper S R56Fits 2012+ Coupe S R58Fits 2012+ JCW Coupe R58We use a customer car and did a before and after dyno at DNR performance in Hayward Ca here is the result .