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Available in Standard 8740 alloy standard shank for most iron head applications, undercut shank for aluminum head applications and Extreme L19 alloy for high boost applications to eleminate head lifting.  We recommend standard versions for up to 30psi Boost and L19 for anything above 30psi.  All kits come with instructions, studs, washers, 12pt nuts and ARP thread lubricant.

ARP Head Studs

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