Clean surface with Ultra Grey will seal easily with no leaks. I still use a generic gasket with it. Why? Because its very difficult to remove the pan. With a gasket it rips when prying it off. Then the pan can be removed. The valley tray, motor plate, water pump, headers, get nothing but Ultra Grey.
Doug
I used to do that and and I got tired of the cleanup when everything was apart. Ultra Grey is almost like an adhesive too. Sometimes its hell to get things apart when you use it. With the Superformance, you can silicone it, pull it apart later and it never rips, and the small dabs of silicone clean right off.
When I switched to the Superformance, I asked the gasket where it had been all my life....
