Well it does get cold here darn it but its not my daily driver so it won't see much cold weather. I don't think the leak could be heard over the rest of the noise the darned old thing makes as you pointed out but at idle it sure sounds bad. I'm going to try running without it and maybe plug up the holes as you did if it runs out OK. I have a set up fentons I'm thinking about putting on or I may have Kansas Kustoms convert my manifold to a split one. Looks like they do good work has anyone used them? If I went this route I would have to worry about heating the manifold as it use the stock method. Thanks again for all the good advice. Sorry I'm such a pain on stupid things like a heat riser but I've never encountered them before.
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