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 G (Acworth, GA) Reviewed for a 2014 Ford Mustang —7/25/2015 4:13 AM
Combined with cold air intake. Truck is now much better for power gain and MPG. all in how you drive. This product has the ability to turn off the active fuel management on my truck. Did not know that.