correct there is the microtech a full stand alone running around 1500$ and there is a cp-e stand back n/a version in the works more like a piggy back that is going to be around 650$ and then there is the a/f controller that is about 300 or so. a "chip" is a common mod to f/i cars or larger displacment engine on a n/a 4 banger the gains would probably be minimal.