- Jan 26, 2001
- Asheville, NC
- 1973 converted to 1980 custom convertible
One of my dynomax headers has leaked since the day I installed them. The leak is coming from the middle section on the passanger side. I suspect its warped just a tad. I'm using Mr. Gasket ultraseal gaskets with square ports. I spoke with Mr. Gasket tech support who suggested round shaped gasket ports for my headers. He said the gasket should match the shape of the header, not the head (which is more square). I ordered a new Mr. Gasket gasket made for o-ring headers per the tech support suggestion. Guess what, they are square but smaller in diameter for more surface area sealing. However, I'm concerned the small diameter opening will reduce exhaust flow. I could really use some advice on this. Not much info available on the net. I also need to consider that no gasket will seal my warped header flange. I may have to cut the flange to relax the bow. Still, I would like more info on the gasket stuff.