ARP Main Stud Kits (125-5401)

The ARP Main Stud Kit is a high-performance fastening solution designed to secure engine main caps and enhance engine integrity. Crafted from 8740 chromoly steel and heat-treated in-house to achieve a 190,000 psi tensile-strength rating, these studs provide exceptional strength and durability under demanding conditions. The precision J-form threads are rolled after heat treatment, resulting in stronger, more reliable threads compared to standard fasteners. The kit includes hardened, parallel-ground washers and high-quality nuts, ensuring a secure and consistent fit. This product is engineered to prevent main cap walk and fretting, thereby maintaining proper bearing alignment and reducing the risk of engine failure during high-stress applications.

Designed for use in various performance engine builds, the ARP Main Stud Kit is suitable for applications requiring maximum strength and reliability. It is compatible with a wide range of engine configurations where main cap retention is critical. The kit is a direct replacement for stock fasteners, offering a bolt-on upgrade that enhances engine stability during high RPM or forced induction scenarios. Installation involves replacing factory main bolts with these studs, washers, and nuts, providing a more secure and long-lasting solution. Ideal for street, track, or racing engines, this kit ensures optimal engine performance and longevity under extreme conditions.