doing a zetec turbo and having problems with the downpipe.

Would the exhaust housing off a t3 RS turbo fit the t3 cosworth turbo?

and does anyone know the difference between them because they are both t3? i think its just the exhaust housing is different and the compressor turbine/housing is bigger?

 

as per PM, housing will fit.
the cosworth housing will flow better though due to design.
cosworth 2wd turbo has a bigger compressor wheel and housing to suit, the 4wd cosworth turbo has a bigger compressor wheel still with matching housing.
all the turbines (exhaust side) are the same, so mix it up with exhaust housings from the ford ranges mentioned.

 

ok cheers for that mate really cleared some stuff up