got it a few weeks ago. super easy to install and well worth the money, imo. the throttle response is a bit better than stock, but still sucks. (stupid computers) aem claims 6whp. my a-dyno says thats about right. the sound at full throttle is stunning. my mileage went up a bit, but nothing to write home about. the box says 50 state legal, so i'm assuming its got the thumbs up from CARB. hope this helps.