Rough Country 90008 Speedometer Calibration Device Rough Country 90008 2006-2017 2WD/4WD Dodge Ram 2500; 2006-2017 2WD/4WD Dodge Ram 3500;Diesel Models ONLY Resets your speedometer to accurate readings for larger tires Easy Plug and Play connection Updates OE ECM Shift Points to accommodate... MSRP: Was: Now: $169.95 Add to Cart The item has been added