Scenario:

Car that has smaller pulley and aftermarket CAI/MAF being sold by a dealer without the hand held tuner.

If the pulley and CAI/MAF factory units are re-installed, is there any way to get the car ECM set back to the factory setting?

If the car was to be purchased as is (with whatever the existing tune is), could you simply by an SCT (or other programmer) and upload the existing tune?

Thinking it would be best to take the car to a tuner and get it checked out, just wasn't sure how complicated things get when the car doesn't come with the hand held that was used to tune it?