External engine fastener kit (includes right side engine cover, center engine/choke cable mount, lifter blocks, rocker covers, front engine upper mount nut, case bolts, timing cover, 1/4" washers, 3/8" HD washers, 5/16" washers and 3/8" lock washers) 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 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.. BOLT KIT ENGINE XL 91-03