Feature precision rolled threads for optimum engagement, to prevent galling and promote more consistent torque loadingWide under head flange design provides even load distribution for optimum sealing of surfaces - preventing leaksTensile strength rated @ 170,000 psi - superior & stronger than OEM & stronger than grade 8 fastenersQuality 12-point heat treated 8740 chrome moly steel bolts with black oxide finishIncludes bolts, hardened washers and a camshaft retaining ringManufactured by ARP® to Feulings® exact specificationsMade in the USA