Umm, is what true? The part about changing the CR is true, you can change the head gasket thickness to alter CR in small increments (actually, some race teams have made special "plates" to radically change the CR of the engines as needed) Metal head gaskets resist blowout better than organic type gaskets, so are preferred for turbo applications where the cylinder pressure is generally greater. But, they don't really make such a diffrence so as to warrent swapping to a metal one just for the sake of going to metal. But, it's worth the money if you're already gonna be in there (though $100 seems really steep), and plan major mods. It's a longevity thing more than anything else. Hope that helps.
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