yeah use sheet metal..

or use nothing at all. i know of lots of downpipes and turbos which dont use gaskets at all.
try it see if it leaks

 

are you guys bead rolling the sheet metal gaskets?

 

Nothing at all sounds good to me. If you are using sheet metal which doesn't compress for the gasket, what is the point? Would you recommend just using some sealant? I've got some (rtv I think) that I used to seal a few spots on the valve cover. Would that work?

 

Ya, you'd think it wouldnt work. But for some reason it just has, for me atleast. I have used it on two different setups. I have had my current setup apart/together a good 4 times w/ the same tin gasket, and no leaks yet.

I also took the DP flange to a machine shop to 'true' it, so having good surfaces is a plus here.

I ------- hate exhaust leaks...

 

My adaptor plate was machined perfectly flat by its maker. HF manifold, plate, and WRX turbo = no gaskets or leaks..

 

All my turbo gasket or out of some sort of sheet metal..it's the stock gasket.
And the Both my ZC headers use a 3-layer sheetmetal gasket...I reuse it everytime...no leaks