the RPM band. Full boost at 2200RPM? Come on now... ;) The NA rear with sport 500 and good downpipes is a killer combo for a street car. You should do some 4th gear pulls from 2000RPM and note when you get to full boost (whatever your full boost is). It's good to document every now and then. I had a small boost leak that I was scratching my head over. The response felt down just a little bit, but I couldn't hear anything. Sure enough, I did a few 4th gear pulls and compared the data to confirm that something was amiss. Now I'm boosting again - still on this hurt motor.. ;)