Test pipes with the GT haus will Be extremely loud, I used to have the GThaus. Maclean can probably atest to that as well.
AAM midpipe with short tails is pretty loud also, not quite as loud as GTHAUS. but its louder than the stillen and I believe that the above(AAM midpipe and short tails) you will most likely make more power also. just a few suggestions.
Also, i will keep an eye out for that Motordyne.
