ARP SB Chevy 4 Bolt Splayed Main Stud Kit

These ARP main stud kits are a smart move when you're rebuilding the bottom end of your Small Block Chevy, especially if you're pushing more power than stock. The kit uses 4-bolt splayed main caps, which means the studs are angled outwards on the outer bolts. This design helps to better clamp the main caps to the block, reducing flex and distortion under heavy load. ARP uses their own high-strength 8740 chromoly steel for these studs, heat-treated to a tensile strength of 200,000 psi. That's a significant step up from factory bolts, giving you a much more solid foundation for your crankshaft.

When you're installing these, remember that the splayed design requires specific torque sequences and often a bit of clearancing on the block's oil relief passages to ensure the outer studs don't interfere. ARP includes detailed instructions with their kits, and it's always a good idea to follow them closely. Using these studs will help keep your main bearings properly aligned, which is crucial for oil pressure and overall engine longevity, especially in performance applications.