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 Pontiac, 400-455, w/ Edelbrock Performer & RPM Heads, Kit

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ARP Cylinder Head Bolts, Hex Head, High Performance, For Pontiac, 350-400-428-455, w/ D port Heads (1967 & later), Kit

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ARP Cylinder Head Bolts, Hex Head, High Performance, For Pontiac, 400-455, w/ Edelbrock Performer & RPM Heads, Kit

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ARP Cylinder Head Bolts, Hex Head, High Performance, For Pontiac, 400-455, w/ Edelbrock Performer & RPM Heads, Kit

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ARP Cylinder Head Bolts, Hex Head, High Performance, For Pontiac, 326-389-421, w/ D port Heads (1965-66 only), Kit

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