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

this crank hub offers unmatched durability and precision

have powered iconic E36 models and remain popular among engine builders and tuners

exhibiting the exceptional strength necessary for handling forced induction engines generating up to 900HP

our kit was specifically designed for the BMW N54 engines

ARP Main Stud Kit, BMW M30 M140iX Upgrade your BMW N55 orThis M30 ARP Main Stud Kit is designed to replace BMW 11111735525 for the M30B30, M30B34, and M30B35 engines that was used in a variety of BMW models, including the E3, E9, E12 and E23. Upgrading from factory main bolts to ARP Main Studs is a simple, yet greatly beneficial upgrade. ARP Main Studs offer the following benefits: Uniform Clamping Force: ARP Main Studs provide a uniform clamping force that OEM bolts cannot. With the improved distribution