Reviewed By Lee B (Marion, KS) Reviewed for a 2009 Ford Mustang —3/2/2012 8:38 AM
Improved throttle response, very impressed. Only one tank through, so far moderate gas mileage improvement.... too soon to rate but its better.... The low end throttle response is worth the money..... any improve fuel economy is a bonus. The "whistle" is there under hard acceleration... Great Value!!!