mike shields says on his spd tuning site that the turbo spools up a couple hundred rpm earlier with the stromung.
i think this is true, the car has got more "pep" in the 3 - 4 k rpm range, but you'll be finding out for yourself i guess ! A bit like the engine's good day vs. a bad day
It's been a few weeks with the exhaust now. I like it, but i'm thinking of getting the 3rd cat eliminator as well just for a bit more volume.