High Performance head bolts are available with a reduced wrenching hex or 12-point and wide area flanged head that eliminates the need for valve train removal to faciliate cylinder head retorquing. All High Performance Series bolts are 180000psi (which is 15% stronger than Grade 8) and kits come complete with hardened parallel-ground washers.

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ARP Cylinder Head Bolts, 12-point Head, High Performance, For Chevrolet BB, Mark V or Mark VI Block, late Bowtie, AFR & Heads, Kit

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