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, High Performance, For Buick, V6 Grand National and T-Type (1986-87), Kit

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ARP Cylinder Head Bolts, 12-point Head, High Performance, For Buick, V6 Stage I (1977-85), 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 Bolts, 12-point Head, Pro-Series, For Buick, V6 Grand National and T-Type (1986-87), Kit

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