Manufactured by ARP, Edelbrock Head Bolt Kits contain a complete set of the highest quality head bolts and hardened washers available. Cold-formed to ensure molecular integrity and heat treated prior to thread rolling and machining. Reduced diameter bolt heads eliminate the need for valvetrain removal to facilitate cylinder head re-torquing. Hardened and parallel-ground washers are included. Rated at 170, 000 p. s. i.Pit Stop USA offers Edelbrock Cylinder Head Bolt Kit - Small-Block Chrysler Head Bolt Kit - For #EDE6077, 6017 - Will Not Fit Stock Chrysler Heads. 8555 at low everyday prices. Be sure to check out all of our products from Edelbrock including Edelbrock Cylinder Head Bolts.