What do you mean they dont work, jetchip says that they do? why wouldnt they work?
Reason? it is because our ECU is not reflashable, if they say they need to reprogram your ECU thats bunch of bull because the ECU will not allow that!
They are pretty much putting their stickers on the ECU and sending it back with stock programming.
Now if they are able to prove me wrong, I am willing to apologize but if you do research our ECU is the non reflashable (not reprogrammable) type.