Anyone on here make or know of a dual exhaust?

 

I was thinking if you cut the Y out of the manifold and ran two pipes with some sort of crossover in the system. It couldnt be too large, maybe 2-2.25 inch pipe.

 

Might sound a bit different than the usual single pipe.

Looking for sound or performance? A different sound you may get, Better performance, probably not without significant and matching engine modifications. Subaru exhaust systems are pretty efficient from the factory. If you are just looking for a new sound, I would consider a muffler change, perhaps a performance muffler with single inlet and dual outlet. Although I have never personally experienced it, I have had friends who have added dual exhaust to their cars looking for a performance increase and ended up losing low RPM torque due to a loss of back-pressure. This experience has been with non-Subaru vehicles though. Maybe someone else has specific to subaru data.

do it in an x pattern with 1-3/4 pipe and shorty glasspacks right off the x

It will be loud and slower. Waste of money.