ARP High Performance Series head bolt kits are tough. They are rated at 180,000 psi--15 percent stronger than Grade 8 fasteners. They come available with a reduced wrenching hex head or 12-point head that help eliminate the need for valvetrain removal when re-torqueing cylinder heads.

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ARP Rocker Arm Studs, High Performance, 3/8 in.-24 Thread, 1.895 in. Effective Stud Length, Pair

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ARP Cylinder Head Stud, Pro-Series, 12-point Head, For Ford SB, World, Man O’War Iron/aluminum block w/ Man O’War 10 Heads, Kit

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