Main Bolt Kit for Cadillac 331-365-390 1949-62, hex

Main Bolt Kit for Cadillac 331-365-390 1949-62, hexFar 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’s rugged primer shafts are rated at 170

A premium grade 8740 alloy chrome moly steel is used to manufacture ARP High Performance connecting rod bolts

For openers

It is for good reason that virtually every top professional enginebuilder relies on ARP Pro Series head studs for their all-out competitionpowerplants

Precision rolled threads prevent galling while promoting more consistent torque loading

originally developed for NASCAR competition

That’s whythe fastener experts at ARP have developed special bolts that are far superior to OEM hardware

Don’t chance it

Material: 8740 Chrome Moly

000 psi rateddamper bolt that can accept a standard 1/2

The popular High Performance Series is rated at 180

Those first moments an engine runs prior to building oil pressure are when damage can easily occur