Unlike cylinder head studs, main studs are designed specifically to hold your crankshaft securely in place. As you increase horsepower and rev past factory limits, you quickly push stock fasteners beyond their intended boundaries. Original Equipment Manufacturers select materials meant strictly for standard consumer driving, making them entirely unsuited for the high heat and extreme stress of a racing environment. Furthermore, factory bolts permanently stretch each time they are torqued and must never be reused, as lost clamping force can lead to catastrophic engine failure.
Upgrading to ARP Main Studs provides the heavy-duty clamping force required to keep your engine together under the harshest racing conditions. These premium fasteners are manufactured from 8740 chrome-moly steel and heat-treated in-house to achieve a massive 190,000 psi tensile strength. By utilizing precision J-form threads rolled after the heat-treat process, ARP creates threads that are 1000% stronger than standard alternatives. Investing in this kit protects your engine block threads while effectively eliminating main cap walk and fretting.