I am new to this site and fairly new to the 24v world so bear with my uneducated questions. when I bought it, 4" exhaust and lift pump in tank now are the only thing that I know of that has been changed for sure. I am looking to chip it for more hp and better mileage... assuming everything else is stock, which programmer would be best allowing that I will upgrade necessary things when I can afford it? Any input is very helpful