Permatex Ultra Copper IS THE BEST thing you can put on it BAR NONE.
WHY you say, The gasket is like sand paper over time it eats away at the manifold Over time the RTV will turn back to a powder when that happens it acts as a lubricant between the manifold and block.
It will extend the life of the gasket along with the parts the gasket is mounted to. I have removed N manifolds that were on the tractor 5 years were Ultra Copper was applied on both sides of the gasket. The gasket was still usable :shock: The gasket had a power on it, it looked like pink baby powder. :)
Don't over kill it a thin coating on both sides will do. If you overkill it, it will squeeze out and restrict the intake ports, a N needs all the help it can GIT...
I don't know were the other guys get there reference to not using RTV on a exhaust manifold for sure it does not apply there day job that depends on fixing it one time.
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