exhaust gasket question

[bigtim]

what sort of gasket is in the part of the exhaust that joins the bit just after the turbo,not the one that's attached to the turbo but after the stubby pipe were the oxygen sensor can go,if anyone knows what i mean
were my actual ss exhaust is joined to this bit it is blowing but i have a t25 and aftermarket ss exhaust and the closest thing looks to be off a 200 sx,would this be right.