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Speedometer Recalibration Unit, Electronic, Chevy, GMC, SUV/Pickup, Each

Changing tire sizes or gear ratios in a computer controlled vehicle can play havoc with your ABS, automatic transmission, and your spotless driving record. Fear not, these JET Accu-Speed control units can correct your speedometer to within one percent accuracy. Just install it in line with your computer and you're ready to recalibrate. These units can be used over and over again.