Use red silicone without any gaskets. I have always filed the mating surface of the flange just to make sure it is flat. Clean the surfaces, put on the silicone, and bolt them up. I've done this with headers, manifolds, turbos (very careful with the qty). I've showed and told numberous people about this and no one has had a leak afterwords. Now if your head mating surface is really warped I might try the silicone on both sides of your header gaskets. Andy >I put a new set of Hooker headers on my 69 AMX/390 and I have an exhaust >leak on the passenger side rear cylinder. I have tried everything. Hooker >even sent me another pair of headers. I also tried Mr. Gasket gaskets and >it is better but still leaking. I can't tighten them any tighter. I ran the >engine until it gets hot and tighten and still it leaks. I have tightened >the bolts in various sequences and this does not help. Now I have doubled >the gaskets on the passenger side, and it is better, but still leaking. I >am lost! Any help would be appreciated. > >Fred (Desparate in Illinois) Warren > _________________________________________________________________ MSN Shopping has everything on your holiday list. Get expert picks by style, age, and price. Try it! http://shopping.msn.com/content/shp/?ctId=8000,ptnrid=176,ptnrdata=200601&tcode=wlmtagline _______________________________________________ AMC-List mailing list AMC-List@xxxxxxxxxxxx http://www.amc-list.com/mailman/listinfo/amc-list or go to http://www.amc-list.com