Reviewed By john f (Stratford, CT) Reviewed for a
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 Brian M (MCHENRY, IL) Reviewed for a
—1/22/2016 5:46 AM
The Hypertech Speedometer Calibrator worked perfectly on my 2015 Ram. I have 37" tires, and was able to adjust for the increased size. Speedo is now accurate.