Do any of the computer tuner shops actually sell you a new one, or are they all just reprogramming my computer (for $ 2000), like Renntech? The module cost would be easier to swallow if there was a noticeable performance improvement.

Have been hearing from techs that after 40 starts, the computer "marries" the other computers in the car and cannot be swapped to another car, is there any truth to this? How are the tuner companies able to do what they do if the computer is set in stone like that? One would think that if all the performance parameters can be read and changed, any stored information about the other computers could be cleared too.

Hoping someone out there knows the answer.