ARP main stud kits are made from 8740 chromoly steel and have a 190,000 psi tensile-strength rating. They are precision centerless-ground and thread-rolled to Mil-S-8879 specs, with a black oxide finish for corrosion resistance. The kits come complete with hardened high-strength hex nuts.
ARP stands behind their products indefinitely with respect to materials and workmanship. Automotive Racing Products would like to deal with the customer directly when they have a problem. Automotive Racing Products is interested in customer satisfaction and will make exceptions on an individual and case-by-case basis.