Reviewed By RICHARD J (Parachute, CO) Reviewed for a 2005 GMC Savana —7/13/2014 9:25 PM
Big difference in power. I get 3 to 4 mpg more when using performance level.
Reviewed By Henry U (Brownfield, TX) Reviewed for a 2011 Ford F-150 —3/3/2015 8:16 PM
I love the throttle response it improves! That alone is worth the money. I raced a 2009 5.4 before I tuned it and I took him but only by a little ways and after I got it, it pulled away faster... He then bought the same tuner and now we're pretty even!!