These bolts are .750" long with 5/16" diameter for Chevrolet V8 and V6 camshafts. These bolts are designed to prevent breakage, rated at 170,000 psi.CatalogUser 1
Typically requiring no machine work, our 504 umbrella seal is a great option for stock guide applications with 3/8" valves needing a seal replacement.CatalogUser 1