Quality 12-point heat treated 8740 chrome moly steel bolts with black oxide finishFeatures precision rolled threads for optimum engagement, to prevent galling and promote more consistent torque loadingWide underhead 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 fastenersManufactured by ARP® to Feuling’s® exact specificationsIncludes moly assembly lubricant for installationIncludes 4 exhaust studsMade in the USA