hmmm, well there is a chance that you might notice a little gain in the car. Was your chip instaled before or after all of your other mods? Because you might of had better results if you had the chip put in after the intake, throttle body, headers, and exhaust. The custom chips are ok, from what I can remember they are a bit pricy. If you are going to do anything else to the car like cams or whatnot I would wait on replacing the chip untill you are done tunning the motor, because you don't want to spend all that money on a chip, and then go back into your motor later. Well I hope that this helped a little.
Patrick