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Join Date: Nov 2012
Location: Somewhere hot and dirty
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In short no on the the new trucks its my understanding that the speedo is precalibrated with only options for stock tire sizes. The options on the tuners just allows you to tell the tuner what tire size you have and it display your actual mph.
2008 F-350 Lariat TRCCSB Lifted, Tuned, and Deleted
2003 Mach1 Bassani, 4.10s, pro5.0, bama tuned
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