These are the absolute ultimate stainless steel head bolts for the Vintage Harley Sportster engines from 1957 to early 1973. There are 8 bolts and washers in this kit. Manufactured from custom 450 Stainless! Heat treated/Age hardened to 180,000 PSI (That’s stronger than grade 8 steel) Centerless Ground! Roll Threaded after heat treatment! They still have the ARP Logo’s on the heads. Polished to a beautiful finish that will never chip, peel, or rust!
