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 Header Bolts, Hex Head, Custom 450, Black Oxide, For Buick, 350-455, Set of 14

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ARP Valve Cover Studs, Black Oxide 12-Point, Cast Alum Cover, DRT, BRO, B&B, 16 Pc

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ARP Cylinder Head Stud, Pro-Series, 12-point Head U/C Studs, For Ford SB, 289-302, 5.0L w/ 351 Windsor Head, Kit

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ARP Header Bolts, Hex Head, 3/8 in. Wrench, Custom 450, Black Oxide, 3/8 in.-16, 1.000 in. UHL, Set of 12

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ARP Header Studs, 12-Point Nuts, Stainless Steel, Polished, 3/8 in.-16, For Chrysler, Small Block, Set of 16

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