2016 Dodge Ram Performance Chips

Lets say you install other than factory size tires on your truck and do not want to get speeding tickets this is the answer. While it took a few tries to figure out the correct settings it was easy to do. After using the Speedometer programmer I found that is has increments of .25 which adjust the speedometer by .5 mile an hour. As a example I got 35x12.5R20 Nitto Ridge Grapplers (actual tire size 34.76) so I played around and came to 33.25 and using a GPS app called DiGiHUD (used this app before changing tire size and in other vehicles to verify it was accurate) it was 100% spot on at all speeds. Only down sides is you need to remove the "tune" when you take your truck/car to the dealer for service due to all the "updates" offered by the dealership for safety and other items. Also the cost of the unit is a bit high for what it does read check engine codes and fix the speedometer I would think a item like this should cost less but sometimes the only way to fix it is to just do it right. P.S. I first took my truck to the dealership and paid them $178 to "calibrate" the speedometer and after I looked in to it the "calibration" was by approximately .02 and told me it would be "close enough" which it was not even relatively close.