ARP SB Ford 351W main bolt kit

ARP's 154-5203 main bolt kit uses 8740 chrome moly steel, a strong material that can handle the increased clamping forces needed for performance builds. This kit is specifically for Ford 351 Windsor small block engines, ensuring a direct fit for your main caps. Using ARP main bolts is a common upgrade when rebuilding or modifying the bottom end of a 351W, as they offer a more consistent and reliable clamping force than stock bolts.

These bolts are rated at 200,000 psi tensile strength, meaning they are well-built to withstand the stresses of higher compression ratios and increased RPMs. The kit includes ARP's 12-point nuts and hardened parallel washers, which help distribute the load evenly across the main cap. When installing, it's important to follow ARP's recommended torque-to-yield procedure, which involves specific tightening steps and lubrication to achieve the correct clamping force and ensure the longevity of your engine build.