I keep seeing online that all of the dual exhaust kits are only for GT's. What crap. My last Sixer had divorced dual exhaust, so clearly it can be done. Knowing that the stock midpipe is a Y, what do i need to do to get my new Six to divorced dual exhaust? Just replace the midpipe and bolt on a new system? Or will an aftermarket catback system just slap directly on the cats without need for a new midpipe? Being "catback" it seems like they would.