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 James P (Palmetto, FL) Reviewed for a 2014 Ford F-150 —5/19/2015 9:21 AM
Since I installed the CAI, SIDO exhaust, Larger tires... I wanted to adjust for speedo & Odometer. Also wanted shift points adjusted. This device did all I needed. I was not looking for custom tuning. I am very satisfied with the results