BOLT KIT PRIMARY XL 91-03

Tensile strength rated @ 170,000 psi – superior & stronger than OEM & stronger than grade 8 fasteners

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

Top engine builders demand quality fasteners! Secure your engine with complete confidence.

Manufactured by ARP(R) to Feulings(R) exact specifications

Kit includes moly assembly lubricant for installation

Quality 12-point heat treated stainless steel

Made in the USA

Not for ’23 models with 121″ VVT motors.

EU: Tensile strength rated at 1172,11 MPa – Superior & Stronger than OEM & stronger than grade 8 fasteners

Includes primary cover, clutch cover and 1/4″ stainless steel washers.