ARP MAIN BOLTS GM 4 BOLT LARGE JOURNAL

ARP MAIN BOLTS GM 4 BOLT LARGE JOURNAL Far superior to any other main bolt kit offered for use in competition engines. Forged from 8740 chrome moly, all bolts feature generous under-head radius and rolled threads for the utmost reliability. The threads are rolled after heat-treating, which makes them about 1000% longer fatigue than most main bolts, which are threaded prior to heat-treating. Available in the popular High Performance Series, which, at a nominal rating of 170,000 psi, is a premium replacement for OEM fasteners. Parallel-ground, hardened washers are included with each kit.