The threads are rolled after heat-treating which gives them about 2000% better fatigue strength than most main bolts that are threaded prior to heat-treating. Hardened parallel-ground-washers are included with each kit.
ARP Connecting Rod Bolts High Series 8740 Chromoly Steel AMC 258 6-Cyl SetOf12
Arp 114-6001 AMC 290-360 V8 rod bolt kit
ARP 114-6002 Connecting Rod Bolt Kit for AMC 390-401 CID V8 (1970 & later)
Arp 114-2001 AMC 290-343-390 intake manifold bolt kit
ARP AMC S/S Intake Bolt Kit
