I was wondering if you should use these spacers along with the gasket that comes with the spark plug. When I asked this question here, I got two different answers so I contacted Moroso Tech and they told me to use the gasket that comes with the spark plug AND the lock washer I thought so but I had to make sure I had never used spacers before I haven't used them yet but I think they're a great idea and they seem well made.
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