8170-10-Z Head bolt washer set

When you're torquing down the heads on a classic Big Twin, the washers are just as important as the bolts. This Colony head bolt washer set is designed for 1936 to 1984 OHV Big Twin models, covering everything from the early Knuckleheads through the Panheads and Shovelheads. These zinc-plated washers are specifically sized for 7/16-inch bolts and are a direct replacement for OEM number 6469. They provide the necessary flat surface for even pressure distribution, which is critical for preventing head gasket failure. Sold as a pack of ten, this set ensures you have enough high-quality washers to complete your top-end assembly with confidence and professional results.