Seal Washers for Water Cooled Head

7 seal washers for Aftershock Motorsports water cooled head. At some point the acorn nut from our supplier started having a logo placed on the bottom. That logo was not always straight and would make a passage for water to pass through. These washer were supplied to ensure there was no leak. Before buying replacements, you can verify if the nuts you have do have the logo. The nuts should seal without a washer if there is not logo on the bottom. We have changed suppliers for acorn nuts. Once we have verified the head seals without the washers, they will no longer be included with the head.