Main Bolt Kit for Chevrolet 396-402-427-454 cid

Main Bolt Kit for Chevrolet 396-402-427-454 cidFar superior to any other main bolts available for use in competition engines, ARP main bolts are designed to meet the exacting standards and demands of professional engine builders. Forged from 8740 chrome moly steel, all ARP main bolts feature a reduced renching head, large underhead radius and rolled threads for the utmost in reliability. The threads are rolled after heat treating which gives them about 2000% better fatigue strength than most main

ARP manufactures a variety of special application-specific bolt and stud kits

including the elimination of main cap walk and fretting

12-point head design and larger than stock shank diameter for increased strength andimproved flywheel register

the harmonic damper absorbs incredible amounts of kinetic energy

High Performance head bolts are available with a reduced wrenching hex or 12-point and wide area flanged head that eliminates theneed for valve train removal to facilitate cylinder head retorquing

the bolt should be replaced immediately

Now available for all popular applications

Precision rolled threads prevent galling while promoting more consistent torque loading

Kits come with hardened parallel-ground washers

ARP’s Pro Series rocker arm studs are made of premium grade 8740 chrome moly steel and heat-treated to a tensile strength of 190

Your choice of chrome moly steel or polished stainless (nominally rated at 180

when the material iseasier to machine)