Our Power Commander V fuel tuner seamlessly optimizes your air/fuel ratio without directly changing the ECU, making it effortless to push it to the max. Better than ever (and smaller than ever), the Power Commander V now has a fuel change range of -100/+250%, automatically giving you the best mix of performance and fuel efficiency at all times. This fuel tuner holds two maps at a time for multiple drive options via the Power Commander V Map Switch accessory (sold separately), as well as 10 throttle position columns, so you won’t sacrifice comfort for performance.