"New Product" Gasket at Bottom of the lower thermostat housing (SA10)
This is a new product from SimmonsAutosportz. This gasket ads 300 % more sealing surface to the current seal located at the bottom of the lower housing. You can leave the seal in the housing and just ad the gasket or just use the gasket for added protection. I have tested the gasket, and gasket with seal to 50 psi for leakage with none noted on my test bench. This will seal the entire lower surface of the housing instead of the 1/16" circle pattern the current seal does. The New gasket is made of a material that is resistant to antifreeze coolant just as my other gasket that goes between the upper and lower housing. No wait time when installing using rtv to dry, just install the new gasket and tighten and that it , no leaks.