Stock Mini Cooper S (R56) downpipe restricts exhaust’s path slowing down the turbocharger spool rate and increasing the exhaust gas temperature while minimizing the power output. We are pleased to introduce two performance versions of downpipes that will free up the exhaust stream using a 2.5” piping. Street version HF1 incorporates a 4” high-flow 200 cpi metal core  CAT (from Magnaflow) while the race version (for OFF ROAD USE ONLY) is cat less.