Originally Posted by
ZincGT
Why do you want that tune dialed in 100% if you are just going to change the car. I understand that you have paid for a tune and want it completed, but are you going to be swapping back and forth between your stock exhaust and the headers? Your fuel trims could be closer, and timing can be dialed in on a dyno but you are showing blips of KR (could be false). Typically with headers and free flowing exhaust you can increase the timing and usually you will have to adjust fuel trims.