Infatti :
It's crap. They wear out within a year. They do give better SOTP feel but only because it fools the comptuer. It gives no real power back. Ask me how I know. Save it and put it towards something else. A aftermarket tune would give you better SOTP and hp than that piece of garbage and isn't much more. I threw mine out along with the air foil, K&N filter, and all that other snake oil they tricked me into buying years ago.