Now that I have some time in the car, I have to say that it's a tossup in my mind whether the ECU tune from InMotion or the new TVT injectors made the single biggest improvement in the power of my NA Xfire.....but with BOTH this thing is awesome, very smooth all the way up the rev range, pulling strongly the whole way. I can even feel it in the mid-range (say 3500 and up).

You know you did something when you take your girlfriend out in the car and she say, WHOA what did you do to it this time ??