#11241721471 and #11241739725 in the BMW M50 VANOS engines with a 140 mm length

these bearings perform exceptionally well in high-horsepower

offering precise tuning

Reduced piston weight contributes to improved engine responsiveness and acceleration

race-proven durability

B58 ARP Main Stud Kit 1303615 #11241721471 and #11241739725 in theThis ARP Main Stud Kit is designed to replace BMW part numbers 11128644674 and 11127613127 for the B58; B58A, B58C, B58D engines found in varies BMW chassis F22, F23, G20, G22, G23, G26, G30, G01, G02, G29, G42, G43, F30, F31, F32, F33, F34, F36 and the Toyota GR Supra A90 A91 chassis. 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: