The single 5” Stainless Steel silencer and unrestricted 2.5” downpipe was designed and built for serious racing and enthusiasts alike. The silencer uses a 2.5” core to match the downpipe and minimizes back pressure on the turbo and helps to keep the turbo spooled for the best possible throttle response. Due to the placement of the Big Core silencer this system is designed to work with 72” wide X3 models. Narrower 64” wide models may require vehicle modifications to prevent the suspension and tires from contacting the exhaust.
FUEL TUNING IS REQUIRED
Fuel Tuning is absolutely required when installing an HMF Exhaust on this machine. Failure to tune the engine can cause excessive damage to the exhaust system and engine, while voiding the warranty on your exhaust and possibly on your machine. (See our selection of tuners)