Stock chip

the stock U4PO has no chip, as my stock 01 computer did not either.. They have an J port ( service port) that a chip or tuner can be plugged into to override the factory tune. Sounds like you had some sort of aftermarket chip in it, though.
 
hmm it was a small silver chip looking thing with U4P0 and "Level 10" on it, maybe it was an aftermarket chip made for the U4P0 computer? maybe i should find it and try it on my car...does it sound like a custom chip or one of those mass produced "Superchips" chips?