ARP Fasteners are the highest quality in the industry.
ARP's automotive racing fasteners are precision made using certified SDF
or CHQ quality material (better than aircraft-quality). ARP
Fasteners are used by leading teams in nearly every form of racing, from
IndyCar to Formula 1. These super high strength fasteners are made in
Southern California. ARP main studs and head studs provide 190,000psi
tensile strength. All stud kits come complete with parallel-ground
washers and aerospace quality nuts. ARP rod bolts provide 190,000 to
220,000psi tensile. That's at least 40% stronger than original types!
Threads are rolled to Mil-Specs after heat treatment, ensuring the best