Feuling's quality 12-point hardened stainless steel bolts have a corrosion-resistant finish. Precision rolled threads for optimum engagement, to prevent galling and support a consistent torque loading. The wide underhead flange design provides even load distribution for optimum sealing of surfaces - preventing leaks. Tensile strength rated @ 170,000 psi - Superior & Stronger than OEM & stronger than grade 8 fasteners.; Engine bolt kit includes fasteners for cam cover, lifter blocks, rocker box, case bolts, oil filter adapter, crank sensor, and exhaust studs . Polished include moly assembly lubricant for installation