BMW Secondary Cat Delete Pipes - RK Autowerks S58.004.1

BMW Secondary Cat Delete Pipes - RK Autowerks S58.004.1 The RK Autowerks Secondary Cat Delete Pipes eliminate the restriction in exhaust flow from the secondary cats, allowing for quicker turbo spooling. The lowered back pressure results in horsepower...

BMW Catless Downpipes - RK Autowerks S58.004

BMW Catless Downpipes - RK Autowerks S58.004 The RK Autowerks catless downpipes eliminate the restriction in exhaust flow, allowing for quicker turbo spooling. The lowered back pressure results in significant horsepower and torque gains that can be...