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Pro series cylinder head studs from ARP 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.
Fastener Style:Stud
Undercut Stud:No
Head Style:12-point
Fastener Material:8740 chromoly
Fastener Finish:Black oxide
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