4-Inch Mandrel-Bent Downpipe w/ High-Flow Cat

The CTS Turbo High Flow Catted Downpipe (CTS-EXH-DP-0036-CAT) is engineered to be a bolt-on solution for reducing exhaust restriction and enhancing performance in select MINI Cooper S and BMW models. This downpipe utilizes 4-inch mandrel-bent piping and is constructed from 100% stainless steel, ensuring longevity and resistance to corrosion. Featuring a 200-cell high-flow catalytic converter, this downpipe aims to improve exhaust flow while maintaining emissions compliance. It also incorporates a stainless steel flex section, similar to factory designs, to allow for proper exhaust system movement and flexibility. Owners can expect potential horsepower gains of 14-16 whp and torque gains of 20-24 wtq, leading to better throttle response and faster turbo spooling times. It is crucial to note that this downpipe DOES NOT FIT JCW MODELS due to a different exhaust connection. It is compatible with various MINI Cooper S models (F54, F55, F56, F57, F60) and BMW models including the X1 (F48), X2 (F48), and 2 Series Gran Coupe (F44) with specific B46/B48 engines. Please consult the detailed fitment list to confirm compatibility with your exact vehicle. Additionally, this product is subject to California Proposition 65 warnings regarding potential cancer and reproductive harm.