I got this to help with turbo lag and shift points and need a speedometer adjustment due to oversized tires on my truck. Installation was easy and setup successful. I had no problem updating the firmware on the device before connecting it to my truck. The midrange setting wasn't a problem either. It really improved performance, my 0-60 time for the install was 7.8 seconds at 397ft. After tuning, my 0-60 time is 7.0 seconds at 359 feet. I'm sure it will fit a little better if I run it differently, but I can definitely tell the difference. This melody does not affect everyday driving. A more aggressive tune requires a higher octane rating of 93. Haven't tried that tune yet.
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