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I installed 275 65 20 KO2 recently and picked up the Hypertech Speedometer Calibrator last week to correct my speedo. I was able to dial it in perfectly with this setup.
However, I'm pulling a 10k lb trailer now and will be getting a performance tuner hence I'm selling this unmarried (back to stock) Hypertech for $200 shipped Continental US.
2015 F150 Hypertech Speedometer Calibration Programmer
