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 Richard B (MINONK, IL) —11/16/2014 9:27 AM
Was easy to install,performance is great,burns tires first 2 gears w/4wd truck,gas mileage not so good,dropped about 3+mpg down to about 13.7mpg,seems to be running real rich as black smoke out of tailpipe like a diesel when you floorboard it.was expecting better mileage and performance.