The top engine builders demand quality fasteners. These are the strongest studs and bolts available and you can secure your engine with complete confidence. Superior in strength and performance to any other cylinder stud head bolt kit on the market, this kit is designed to exceed the needs of high-performance engines. Don't risk head gasket failure. Stock cylinder studs are designed as a stretch to torque stud with a one time use only lifespan. Feuling studs are installed to a torque spec, can be reused and carry a lifetime warranty. Heat-treated 8740 chrome moly steel studs.. Precision J-form threads for optimum engagement, to prevent galling and promote more consistent torque loading. Special alloyed stainless steel head bolts. Manufactured by ARP to Feulings exact specifications. Recommended for all V-Twin engines. Stock replacement. Made in USA. Head and Cylinder Bolt Kits
