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, 396-402-427-454 Cast iron OEM, Kit

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ARP Cylinder Head Bolts, 12-point Head, Pro-Series, For Chevrolet BB, Mark IV or Mark V Block, AFR Casting w/ U/C Bolts, Kit

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