long time working on cars heres what u use on intake and all gaskets no more leaking period! high-temp red rtv silicone [gasket maker] Ive patched sub woofers when the foam rings blew out. this stuf has perfect headers on hot rods for years my moter has no leaks at all. I even put a perfect dab around the primer button on the carb, can still use the button I have picts coming by this weakend. thers a black version as well but not for high heat remmember [gasket maker] permatex