ARP EVO VII/VIII/IX MAIN STUDS

ARP uses a premium grade 8740 alloy that is rated far superior to "aircraft" quality. Then, each stud is heat-treated to 190,000 psi. Every ARP stud kit exceeds the most stringent aerospace specifications. All kits come complete with hardened parallel-ground washers and aerospace quality nuts.

We torque these main stud nuts to 60 ft/lbs. of torque.