If you decide you want a re-tune, talk to Marty. You can remote tune with them and datalog with your X3 plugged into your laptop. They will log into your laptop and set it up for you. Just follow their direction and the process goes really smooth.
You "feel" the difference because you want to "feel" the difference. Since you just spent money on the upgrade you "have" to feel the difference
I'm looking to eliminate the double pump process I have to follow right now to get the pedal hard
2004 300A Procharger #0010 D1X
2003 300A Procharger #0017 D1SC (SOLD. Last I heard, it was in Washington State)