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 Cylinder Head Stud, Pro-Series, Hex Head U/C Studs, For Chevrolet BB, 454-502, Mark V/ Mark VI w/ Brodix/Canfield Heads, Kit

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ARP Valve Cover Bolts, Chromoly, Black Oxide, 12-Point, 1/4 in.-20 Diameter, Cast Aluminum Covers, Set of 14

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ARP Rocker Arm Studs, High Performance, 7/16 in.-20 Thread, 1.9 in. Effective Stud Length, Kit

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Proflow Header Bolts, Hex Head, 3/8in. x 1'' Length, Custom Black Oxide, For Chevrolet, For Ford, Set of 16

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ARP Valve Cover Studs, Stainless Steel, 12-Point, 1/4 in.-20, 1.500 in. UHL, Set of 14

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