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1. ATK ships the engine with a box of gaskets, which includes the intake manifold set. I laid down a large bead of Permatex Ultra Black Hi-Temp RTV silicone on the front and rear edge of the block instead of using the rubber gasket. I have done this on every intake I've installed with great results. I have had one of the rubber gaskets slip out before and start seeping oil so I never used them again. I also put a very thin bead of RTV around the water ports on the head just to be safe.