I'm making gaskets for my turbo manifold flange and the down pipe flange, what material should I use and where can I get them?

 

sheet metal

 

How thick those it need to be?

 

Bubble gum works well. :P Heh, I would recommend using some sheet metal like Semnos said for those gaskets. You probably don't need a downpipe gasket. The carbon buildup will probably seal it up pretty well anyway.

 

Or you can get actual exhaust gasket material from a gasket place. Look one up. I got about 2 sq feet for free with some other stuff I bought and it will be enough to make every gasket I need. It feels like some kind of tough plastic or something.

 

I wouldn't trust plastic, paper or any fiberous gasket material for that type of heat... Use metal like copper or a metalic mix...

 

You wouldn't use exhaust gasket material for heat? It isn't plastic... It just feels kinda like that. It is called Thermoseal, and that is what it is designed for (unlike tin) so I imagine it will work at least as well. Have fun compressing your tin to make it seal. I hope your flanges are perfectly flat... With all else equal, I'd prefer to use something designed to fit the purpose.

 

i got some sheet metal put it inbetween two flat bits of wood then took a hole saw to it, the thing came out flat as a pancake... factory finish lol