Every head out there will have its own specific head fastener torque pattern. If you buy aftermarket bolts or studs from a company such as ARP they will include a card with patterns and torque ...

Engine fasteners, like head bolts or main cap bolts ... Tighten mildly by hand, then to the torque spec 1. Circular patterns of bolts, typically the lug nuts on wheels, should be tightened ...

ARP studs are a popular upgrade in automotive racing engines, and are proven to be more durable than OEM head bolts ... the engine manufacturer's torque pattern when installing the head(s).

That direction firmly defined our search pattern along with ... numbers between peak torque and peak horsepower. As expected, the dyno chart reveals that the head swap made a significant gain ...

Whether tightening head bolts on an automobile engine ... Always follow the manufacturer’s directions regarding torque direction, proper force, torque pattern/sequence, use or non-use of lubrication ...

Because of the bolt head, you must twist head studs to install them. That can result in things like inaccurate torque readings, as well as over or under-tightening and cracked components.