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 Header Bolts, Hex Head, 3/8 in. Wrench, Stainless Steel, Polished, 3/8 in.-16, 1.000 in. UHL, Set of 12

ARP Header Bolts, Hex Head, 3/8 in. Wrench, Stainless Steel, Polished, 3/8 in.-16, 1.000 in. UHL, Set of 12

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ARP Cylinder Head Stud, Pro-Series, Hex Head, For Chevrolet 4 & 6 Cyl, 4.3L 90 V6 w/ 18 raised port, Kit

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ARP Cylinder Head Stud, Pro-Series, 12-point Head, For Mitsubishi, 2.0L (4G63) DOHC 1994-07), Kit

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ARP Valve Cover Bolts, Stainless Steel, Polished, Hex, 1/4 in.-20 Diameter, BBC Brodix Valve Cover, Set of 7

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ARP Cylinder Head Stud, Pro-Series, 12-point Head U/C Studs, For Ford 4-6 Cyl, 2.0L (YB) DOHC Cosworth Sierra/Escort, Kit

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