These ARP High Performance series connecting rod bolts are made from seamless and defect-free 8740 chromoly steel. All ARP rod bolts are heat-treated before grinding and thread rolling and have a large underhead radius for greater strength. Guaranteed to pass magnetic inspection testing, these bolts are nearly five times stronger than OEM bolts. They're used in applications ranging from stock replacement to Circle Track, marine, and drag racing engines.
This listing is for a set of ARP Hi-Performance Series connecting rod bolts and nuts for 1959-66 Buick 401ci and 425ci "Nailhead" and 1967-76 Buick 400ci, 430ci, and 455ci V-8 engines. P/N 125-6001. Bolt specifications are as follows:
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