7/16-20 x 4.250 hex black oxide bolts

7/16-20 x 4.250 hex black oxide boltsMaterial: 8740 Chrome Moly Finish: Black Material 2: Finish 2: Origin: USA

and has the retaining washer installed

Features an exclusive 12-point cap screw design and appropriate grip length per the application

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

which makes for amore consistent clamping force – and one that compensates forhead gasket compression when the cylinder heads are installed

which is substantially stronger than the OEM bolts

It must be kept well-oiled and not exposed to moisture

Most applications have undercut short bolts that can help eliminate head gasket failures through providing more “stretch” to compensate for the additional compression of gaskets

These premium grade bolt and stud kits are engineered to properly engage the engine block threads and resist loosening

or using a spacer for clearance

ARP’s Pro Series rocker arm studs are made of premium grade 8740 chrome moly steel and heat-treated to a tensile strength of 190

They are designed for each specific application and provide the optimum grip

This procedure (done only to the shorter studs)more equalizes the “stretch” of both studs