Does anyone know exactly what the difference is between the two. Is it possible to modify a T3 flange manifold to accept a t25 turbo. ie. is the bolt pattern on the t25 smaller than that of the t3, but larger than the exhaust inlet, so the manny could be redrilled? Or will I have to get an adaptor or another flange welded on? Help a brother with boost...

 

The T25 is the smaller flange. Why not just get a T25 manifold? HKS makes them pretty cheap for the B and D series engines.

Sonny

 

I'm getting one that's in good shape for really cheap I'm on a tight budget for the moment, too...

So, could one just turn the holes into slots, lets say and have those line up with the holes on the turbo?