Looking at power curves for a chip won't be that helpful because it is totally dependent upon your engine and what mods you have. You will not get huge power increases from ANY chip. More airflow and fuel is what makes more power. The chip does some nice things like alter the rev limiter, change shift points, advances timing, and increases injector duty cycle. The increased duty cycle will allow sufficient fuel to be supplied to the engine when you increase airflow via intakes, exhaust, whatever. If you didn't have it you would probably run lean or need to upgrade parts of your fuel system. I think the chip is a worthwhile investment and will support your future upgrades up to a point. It is a good starting place. I got Mine from Willie and had no problems with the ECU or his service.