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 Bolts, 12-Point Head, Chromoly Steel, Black Oxide, 3/8 in.-16 RH Thread, 1.000 in. UHL, Set of 5

ARP Bolts, 12-Point Head, Chromoly Steel, Black Oxide, 3/8 in.-16 RH Thread, 1.000 in. UHL, Set of 5

$26.79

ARP Nut, Hex, ARP Stainless Steel, Polished, Flanged, 3/8 in.-24 Thread, 180000psi, Each

ARP Nut, Hex, ARP Stainless Steel, Polished, Flanged, 3/8 in.-24 Thread, 180000psi, Each

$6.27

ARP Bolts, Hex Head, Custom 450, Black Oxide, 3/8 in.-16 RH Thread, 2.500 in. UHL, Set of 5

ARP Bolts, Hex Head, Custom 450, Black Oxide, 3/8 in.-16 RH Thread, 2.500 in. UHL, Set of 5

$37.23

ARP Washer, Hardened, High Performance, Chamfer, Flat, 5/16 in. ID, 0.625 in. OD, 0.120 Thick, Stainless Steel, Polished, Set of 2

ARP Washer, Hardened, High Performance, Chamfer, Flat, 5/16 in. ID, 0.625 in. OD, 0.120 Thick, Stainless Steel, Polished, Set of 2

$6.45