Main Studs ARP main stud kits offer many important reasons for use, including the elimination of fretting and main cap walk, as well as protecting the threads in your engine block.
Complete with hardened parallel-ground washers and high quality nuts, all kits are included.
Some applications have provisions for mounting windage trays and specially designed standoff studs with serrated lock nuts to securely position the windage tray.
Manufactured from 8740 chrome moly steel, the studs are heat-treated in-house to 200,000 psi tensile strength, and precision J-form threads are rolled after heat-treat to create a fastener with threads 1000 stronger than others.
Main Bolts Far superior to any other main bolt kit offered for competition engines, ARP main bolts are designed to meet the demands and exacting standards of professional engine builders.
Forged from 8740 chrome moly, all bolts feature rolled threads and generous under-head radius for utmost reliability.
The threads are rolled after heat-treating, making them about 1000 longer fatigue life than most main bolts, which are threaded prior to heat-treating.
Available in the popular High Performance Series, which has a nominal rating of 180,000 psi, is a premium replacement for OEM fasteners, or the 200,000 psi nominal rated Pro Series, application-specific main bolts with reduced wrenching head designed for competition applications.
Each kit includes parallel-ground, hardened washers.
Main Stud Kit 2Bolt Main w/ Windage Tray
