Well I heard of a couple, like the JET chip but from what Ive heard they are a waste of $$$. I don't think there are any real performance chips made for the N/A's...But you could take your ECU into a tuning shop (look around im sure you can find some place on the net or even localy), And get a chip custom made, and tuned by profesionals. This way you could get the chip designed to what you wnat to do with the car, now and in the future.
Methman