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United States of America, Aurora
1 Level
713 Review
50 Karma

Review on 🚀 Enhance Performance with Hypertech 742501 Speedometer Calibrator by David Perry

Revainrating 5 out of 5

Read the instructions. First

I needed to change the differential ratio in my Mustang GT 07 (modification only). This device allowed me to change the differential to make my speedometer work properly. Please note that there are limitations on differentials that are compatible with this Mustang unit. I don't recall him having the ability to go into a higher gear (e.g. 2:73). I only remember 3:31, 3:55, 3:73 and possibly 4:11 as options for 07.

Pros
  • Read and Clear Diagnostic Trouble Codes (DTCs)
Cons
  • No Form Required