Recommended piston-to-wall clearance is ~0

and 11121722738 for the M20B20

the risk of bolt stretch and potential engine damage is mitigated

1992-1996     E36     318i / 318is

ARP Main Stud Kit, BMW M10 F93 Recommended piston-to-wall clearance is ~0This ARP Main Stud Kit is specifically engineered for use with BMW M10 B18 and M10 B20 engines. 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 bearing caps comes better, more precise crank alignment for