BOLT KIT PRIMARY XL 91-03

Not for '23 models with 121" VVT motors. Top engine builders demand quality fasteners! Secure your engine with complete confidence. Quality 12-point heat treated stainless steel 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 & stronger than OEM & stronger than grade 8 fasteners Manufactured by ARP® to Feulings® exact specifications Kit includes moly assembly lubricant for installation Made in the USA