Reviewed By john f (Stratford, CT) Reviewed for a 2010 Mercury Grand Marquis —12/14/2013 6:34 AM
Did download without any additional changes yet. Performance has increased. Also sounds better. Very easy to do.
Reviewed By Russell P (EL PASO, TX) Reviewed for a 2014 Toyota Tundra —4/15/2015 3:14 AM
Went from Stock to 35s. Really easy to put on, truck shifts smoother, speed is perfectly on with two GPS and I also had my wife drive her car next to me and tell me how fast she was going. I actually gained 1.5 MPG, don't know how or why but it did. Tucks right behind the dash and I left the usb in it so I could change it if need be without taking the dash apart again