Rocker arm supports, breathers, rocker box housings, washers Quality 12-point heat treated 8740 Chromoly steel bolts with black oxide finish Feature 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 Superior & Stronger than OEM & stronger than grade 8 fasteners Kit includes moly assembly lubricant for installation