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, 18mm ID, 73.7mm OD, 9.9mm Thick, Chromoly, Black Oxide, Each

ARP Washer, Hardened, High Performance, Chamfer, Flat, 18mm ID, 73.7mm OD, 9.9mm Thick, Chromoly, Black Oxide, Each

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ARP Washer, Hardened, High Performance, Flat, 5/16 in. ID, 0.563 in. OD, 0.063 Thick, Cad Plated, Each

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ARP Washer, Hardened, High Performance, Chamfer, Flat, 1/4 in. ID, 0.550 in. OD, 0.075 Thick, Chromoly, Black Oxide, Each

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MANLEY Washers, Intake Bolt, Steel, Zinc, .100 in. Thick, Set of 16

MANLEY Washers, Intake Bolt, Steel, Zinc, .100 in. Thick, Set of 16

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