The Pro Series cylinder head bolts from ARP are cold-forged to ensure molecular integrity. They are heat-treated prior to thread rolling and machining, and are rated at a whopping 190,000 psi. The Pro Series are also available with hex and 12-point heads. All kits come complete with hardened parallel washers for even load distribution and accurate torque readings.

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ARP Cylinder Head Bolts, 12-point Head, Pro-Series, For Buick, V6 Stage II, 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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