The Dinan or Macht Schnell elbows with filters will help improve sound fairly dramatically (I've had both). Think Dinan also now sells just the intake elbow without the filter, so you can keep the stock filter or bolt on the AA filter as keeps the stock charge pipe whereas the more expensive Dinan intake includes elbow, charge pipe and filter (K&N).
http://dinancars.com/product/d760-00...ries&mid=1113/
http://dinancars.com/product/d760-00...ries&mid=1113/
Also, for a cheap way to potentially increase engine/cockpit noise, maybe try these out:
http://www.m3post.com/forums/showthread.php?t=932472
I was thinking of getting the BMS filters and seeing if the Technocraft CF cowl covers would fit properly so that adds more sound. Otherwise, can install the BMS filters and get rid of the cowl and see if sound is improved. Would be much cheaper way than getting a CF covered plenum (thx for the compliments btw
).