a4indian

would 3 inch piping on an exhaust have too little back pressure on the turbo!!

The Original Jay_SB

Probably, from the K03. Downpipe would help a bit too....

cana

Mine runs fine, but growls in heavy rain.

BigDog

restriction, and thus back pressure, than any exhaust after it ever could. Hell, you coulc run open pipes after the turbo and have no back pressure problem. In fact, you want the lowest pressure after the turbo possible as it helps facilitate moving air through the turbo itsself. Ideally, a vacuum after the turbo would be best.

TyWebb

with no mods dont go over a 2.5 inch exhaust. for over 250hp then move to a 3 inch exhaust.