its $50 to reburn it, more if you send it to a sattellite dealer for ts(that was as of 6 month ago, things may have changed....). as far as power, it all depends on your mods and how the chip is written. 79broncoidi on this forum had one and had good power out of it, however the "140" setting was useless and would make the engine die if you floored it. i think the evolution would be comparible in power if you were to get an off the shelf generic race program on the chip. i think the same goes for mileage on the "econo" settings as well.