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.
It is highly recommended that the block be align honed with the new studs to verify that the main journals do not move at all.
- Mitsubishi Lancer Evolution 10
- Larger studs are to be torqued to 60ft lbs, smaller studs are torqued to 20 ft lbs.