ARP Pro Series cylinder head studs are cold-forged
to ensure molecular integrity. They are heat-treated prior to thread rolling
and machining–and are rated at a whopping 220,000 psi. ARP Pro Series kits
are also available with 12-point nuts, and all kits come complete with
hardened parallel washers for an even load distribution and accurate torque
readings. With hundreds of models ready to ship, these cylinder head
fasteners can be ordered for virtually any style engine.

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