Cylinder Head Bolt Kit for Chevrolet 396-402-427-454 Cast iron OEM

Cylinder Head Bolt Kit for Chevrolet 396-402-427-454 Cast iron OEMHIGH PERFORMANCE SERIESHigh Performance head bolts are available with a reduced wrenching hex or 12 point and wide area flanged head that eliminates theneed for valve train removal to facilitate cylinder head retorquing. All High Performance Series bolts are 180,000 psi (which is 15%stronger than Grade 8) and kits come complete with hardened parallel ground washers. PROFESSIONAL SERIESAll Pro Series bolts are cold forged to ensure molecular integrity,

while expensive

ARP manufactures a variety of special application-specific bolt and stud kits

Our special purpose washers are constructed from either premium chrome moly with a black oxide finish or polished ARP stainless steel and are hardened and parallel-ground

The immunity to hydrogen embrittlement and corrosion of these materials is a significant design consideration

Made from premium grade 8740 andheat-treated to 190

Available for both single and dual metering block Holley and Carter AFB applications

Washers and nuts included where applicable

It has approximately 200% the fatigue life of 8740 chrome moly steel and has a tensile strength of 220

A true high performance washer from ARP

All hex nuts are rated 180

Unfortunately

000 psi tensile strength material and proprietary (ARP2000®) 220