Fastener Kit - External Engine - 12-Point - XLFeatures 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
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