Description

Big bore, big compression and big throttle take their toll on hard parts and engine studs are no different. If your motor sees any of these we recommend stepping up to S&S chromoly steel cylinder head bolt and studs. 4140 chromoly studs, oil quenched and tempered to 39-44 HRC. 180,000 psi tensile strength. Rounded thread roots, rather than flat, improving fatigue strength. Positive stop shoulder allows for consistent installed height. Set services one engine. Made in the USA.