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 Bolts, Hex Head, Stainless, For Buick, 350, (black oxide inner rows, stainless steel outer row), Kit

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ARP Cylinder Head Stud, Pro-Series, 12-point Head, For Chevrolet BB, Brodix, w/ For Pontiac Pro Stock Heads, Kit

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ARP Cylinder Head Stud, 12-point Head, High Performance, 8740 Black, 190000psi, LSA, Kit

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ARP Cylinder Head Bolts, Hex Head, High Performance, For Chevrolet BB, Mark IV or Mark V Block, Brodix Heads, Kit

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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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