Will my car run fair enough between having the header put on and uploading a tune?[/QUOTE]
Yes it will run fine. It may bog when you take off from a start. I know mine did. No big deal though.
Dominant Eng. orp, ITG Maxogen panel filter, Focus-Power tune, Team Dynamic Pro Race 2 16x7 wheels in black(36 lb weight reduction from stock tire/wheel combo)