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, 12-point Head, High Performance, For Chevrolet BB, Mark IV or Mark V Block, Brodix Heads, Kit

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ARP Cylinder Head Stud, Pro-Series, 12-point Head, For Chevrolet SB, LS Series, Gen III 2003 & Earlier, 4 short, 16 Long, Kit

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ARP Cylinder Head Bolts, 12-point Head, High Performance, For Buick, V6 Grand National and T-Type (1986-87), Kit

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ARP Cylinder Head Stud, Pro-Series, 12-point Head U/C Studs, For Chevrolet BB, 396-402-427-454, Mark IV w/ Edelbrock Line Heads, Kit

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MILODON Cylinder Head Studs, 12-point, 8740 Chromoly, Black Oxide, Washers, For Ford, 429, 460, Kit

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