Are after market stainless cosworth 4x4 downpipes and cosworth 2wd downpipes the same?

Will be making up my exhaust system once the engine is back and plan on using a stainless downpipe if I can find 1 second hand as I can cut the 3 bolt flange off and weld on a v-band

I'm using a 2wd manifold but a 4x4 gearbox if that makes any difference

It's only the standard downpipe I plan to use if its feasible and I can find a good second hand 1

Thanks
Marc