It's been a minute since I've played with a GT500/ford tuning. I recently bought an 08 GT500. It does have the ford racing CAI. From what I've read, to make it work the car has to be tuned for it. It's the 113mm unit that attaches to the factory tube. I've bought a 2.65 pulley and will be getting a tune, most likely from VMP as I've used them in the past. I didn't get a tuner with the car. So my question is can they write a tune over a tune or will I need to get this car flashed back stock then get it tuned for the pulley/CAI?