I dont have a chip, tuner, btm, or anything. Drives like stock, better on gas than stock, runs excellent, no surges or flat spots, reliable as hell. It all depends on how lucky you are, whether or not you need a tune/tuner. Sure, I'd have a cleaner looking A/F curve with a tune but you know what, it drives fine and runs 10s and drives home. I would say I dont need a tune. If it popped, bucked and spuddered home with a huge flat spot in midrange rpm's (just examples of when you need a "tune"), than I would do something about it. Thats really the basis of whether or not you need to change the tune.