got an RS-R header, didn't come with any gaskets, is the one connecting the header to the cat a donut gasket (fat round one) or one of the thin steel plates like the ones that are used throughout the exhaust system?

 

Between the engine and the header, there is a thin gasket. Between the header and the catalytic converter, there is a thick round gasket.

 

Donut gasket is the one that goes between the header and the cat....

I guess the one between the block and the header is the exhaust manifold gasket....

 

Great, I thought it was a donut but wasn't sure, thanks.

 

i just installed an rs*r header on my d series and i used the stock donut gasket.