The 12-point nuts feature a hardened

Upgrade your BMW N55 or S55 engine with the Ferrea Valve Kit for greater strength

For additional protection

such as those found Radium Engineering fuel rails

Our kit includes Calico-coated rod bearings and ARP connecting rod bolts

BMW S54 Complete Engine Build Kit by 5150 AutoSport CAN Keypad The 12-point nuts feature aHave you been considering building your E46 M3 but weren't sure where to start? Unsure of what components to pair for the best possible power and reliability combination? We receive inquiries daily from S54 owners interested in building their engine but unsure where to start. The 5150 AutoSport Complete Engine Build Kit features every component you need to fortify your BMW S54 Engine internally and prepare for high power, high boost applications, or