BMW S65 Applications:

Aerospace-grade alloy construction for outstanding strength and longevity

they improve valve control

or competition-level racing

G22 / G23 430i

ARP Main Stud Kit, BMW M40/M42/M44 Extreme BMW S65 Applications:This ARP Main Stud Kit is designed to replace BMW 11111735525 for the BMW M40B16, M40B18, M42 B18, M43B16, M43B18, M43B19 or M44 B19 found in E36 and Z 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: ARP Main Studs provide a uniform clamping force that OEM bolts cannot. With the improved distribution of pressure across main