GM and honda use this gray RTV and that shit is pure evil.
evil as in good, or evil as in bad?
I've always used Ultra Copper on all of my intakes. I used it on stock stuff, and I even used it on an old H,C,I 5.0L with a P-600B Procharger making 12lbs of boost. No trouble down the line. Handles a lot of heat.
Thanks I'm looking for adhesion more than actually creating a gasket.
Sean I did see some Google results mentioning the GM stuff, it's stickier than Permatex RTV then?
I'm guessing this is what you mean?
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USE RIGHT STUFF , ITS THE BEST , ALL I USE ANY MORE