Cylinder Head Bolt Kit for Chevrolet Mark V or Mark VI block with late Bowtie, Dart aluminum, AFR &

Cylinder Head Bolt Kit for Chevrolet Mark V or Mark VI block with late Bowtie, Dart aluminum, AFR &High 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. Material: 8740 Chrome Moly Finish: Black Material 2: Finish 2: Origin: USA

The threads are rolled after heat-treating which gives them about 2000% better fatigue strength than most main bolts that are threaded prior to heat-treating

Washers included

A premium grade 8740 alloy chrome moly steel is used to manufacture ARP High Performance connecting rod bolts

ARP uses a unique manufacturingprocess where the alignment sleeve is roll formed onto the shaft(not welded or pinned)

and precision J-form threads rolled after heat-treat to create a fastener that has threads 2000% stronger than others

Higher Performance Series: Made of 8740 chrome moly forgings and heat-treated to180

They’re made from 8740 chrome moly steel

Made from premium grade 8740 andheat-treated to 190

thread pitch to thread pitch

and the favoriteof leading professional engine builders in all forms of racing

Wide underhead flange and companion washers provide even load distribution

They’re made from premium grade aerospace chrome moly and centerless ground to precise diameter