Features precision-rolled threads for optimum engagement, to prevent galling and promote more consistent torque loading. Wide underhead flange design provides even load distribution for optimum sealing of surfaces – preventing leaks. Tensile strength rated @ 170,000 psi; superior and stronger than OEM and stronger than grade 8 fasteners. External primary fastener kit (includes primary cover, clutch cover and 1/4″ stainless steel washers). Manufactured by ARP® to Feuling’s® exact specifications. Includes moly assembly lubricant for installation. Quality 12-point heat-treated stainless steel. Made in the U.S.A..