Cylinder Head Bolt Kit for Chevrolet 396-402-427-454 Cast iron OEM (black oxide inner rows, stainles

Cylinder Head Bolt Kit for Chevrolet 396-402-427-454 Cast iron OEM (black oxide inner rows, stainlesHIGH 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,

You’ll note that the studs have a radiused bullet nose that serves to locate the pan rails

The shaft is made from heat-treated

They’re application-specific

Specialfeatures include 1/4

square drive forged into bolt head

Precision rolled threads prevent galling while promoting more consistent torque loading

To ensure that the damperis locked in position

Studs are preferred by many Pro engine builders because they eliminate the chance of pinching gaskets and contribute to easier engine assembly

000 psi bolts that let you exert maximum clamping force

Your choice of chrome moly steel or polished stainless (nominally rated at 180

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

threadpitch to thread pitch