So I just installed a Cobb turboback on my 04 Subaru WRX, and everything went well aside from a few rusty bolts. However, there seems to be a small exhaust leak between the down and mid pipes.
The stock donut gasket was un reusable so I ended up buying a new donut gasket from advanced auto parts for like $2. Cobb specifically says that you use the donut and does not mention using a full 3" flange gasket.
From what I have read so far, the Cobb downpipe it is meant to use a donut gasket due to its easy application to the stock cat-back. I would of course think that because I bought a turboback exhaust system the Cobb midpipe and downpipe should mate easily using a donut gasket as well. However, due to the exhaust leak I am starting to wonder..
Has anyone else out there had this problem? If so do you have any solutions or ideas on how I can fix this exhaust leak? Perhaps a bigger donut gasket? Perhaps using a 3" flange gasket will work properly? Perhaps avoid buying $2 gaskets? I have heard that putting anti seize on the gasket will help it bond better, not sure on that one though..
I don't have any pictures right now so I am sorry about that, and will work on taking one or two at some point here.
Any help would be appreciated. Thanks!