IAME KA 100 Cylinder Head Nut Washer. This Washer is important to distribute the clamping force over the surface of the cylinder head. Each nut securing the KA 100 cylinder head to the engine requires this washer, which also aids in heat dispersal during engine operation.
Each washer is sold separately, and is M8 in inside diameter to fit around the mounting studs for the head assembly. (4) are required to fasten the head to the cylinder mount studs.