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BOLT KIT,MAIN BEARING CAP 390/427/428
ARP High Performance Main Bearing Bolt Kit for 390/427/428.
ARP bolt kits feature 6-point nuts with parallel-ground, hardened washers. Made from 8740 chrome moly steel, all bolt sets are heat treated to 170,000 PSI and exceed aircraft quality standards.
The threads are rolled after heat treating, which gives them about 1000% longer fatigue life than most main bolts, which are threaded prior to heat-treating. All bolts feature generous under-head radius and rolled threads for the utmost reliability.
ARP is the industry standard by which all others are measured.
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