Please Note: Must check intake intermediate rockers for clearance to the new racing cam lobe

Whether you're chasing horsepower records or building a reliable

Upgrade your B58 engine with the Ferrea Valve Kit to experience enhanced tensile strength

With eight injector and eight ignition drives

SuperSprint Tubular Stepped Header, BMW S54 S52 Please Note: Must check intake+ 15 19hp gain over 'Euro style' headers,+ full stepped tubular and equal length headers,+ bolts to the engine with factory hardware and gaskets,+ used with Supersprint stepped section 1 (with or without cats)While stepped header technology has been prevalent in Formula 1 for some time, these SuperSprint Headers were the first application of a stepped design on the E46 M3. In an engine as finely tuned as the S54, airflow management is crucial for