The ARP 7mgte main stud kit is designed for the 1986.5-1992 MA70 Toyota Supra. The ARP main studs help eliminate main cap walk/fretting and protect the threads in your engine block. The studs are made from 8749 Chromoly steel and heat-treated in-house to 190,000 psi tensile-strength rating. The kit comes complete with hardened parallel-ground washers and high-quality nuts. This is a must for high power 7mgte builds!