ARP insert washers are designed to protect the top of the bolt holes from galling or collapsing around studs or bolts. They are fully CNC-machined from premium through-hardened 8740 stock.

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ARP Washer, Hardened, High Performance, Chamfer, Flat, 3/8 in. ID, 0.725 in. OD, Chromoly, Black Oxide, 0.12 in. Thick, Set of 10

ARP Washer, Hardened, High Performance, Chamfer, Flat, 3/8 in. ID, 0.725 in. OD, Chromoly, Black Oxide, 0.12 in. Thick, Set of 10

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ARP Washer, Hardened, High Performance, Chamfer, Flat, 1/4 in. ID, 0.550 in. OD, 0.075 Thick, Stainless Steel, Polished, Each

ARP Washer, Hardened, High Performance, Chamfer, Flat, 1/4 in. ID, 0.550 in. OD, 0.075 Thick, Stainless Steel, Polished, Each

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ARP Washer, Hardened, High Performance, Chamfer, Flat, 3/8 in. ID, 0.625 in. OD, Chromoly, Black Oxide, 0.12 in. Thick, Each

ARP Washer, Hardened, High Performance, Chamfer, Flat, 3/8 in. ID, 0.625 in. OD, Chromoly, Black Oxide, 0.12 in. Thick, Each

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MANLEY Washer, Intake Bolt, Chromoly, Polished, .125 in. Thick, Each

MANLEY Washer, Intake Bolt, Chromoly, Polished, .125 in. Thick, Each

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ARP Washer, Hardened, High Performance, Chamfer, Flat, 3/8 in. ID, 0.655 in. OD, Chromoly, Black Oxide, 0.12 in. Thick, Each

ARP Washer, Hardened, High Performance, Chamfer, Flat, 3/8 in. ID, 0.655 in. OD, Chromoly, Black Oxide, 0.12 in. Thick, Each

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