Quote: Can those shim gaskets be used with aluminum heads? I have a "fuzzy memory" of reading here that some guys used them with a spritz of copper coat on them?
A Cometic is just a multi layer metal shim style gasket so I would say yes you can use them but I have heard also that the steel can leave a "mark" if you will on the head. A thin coat of Coppercoat would likely help prevent that.
