5 Star Tuning 5 Star Custom Tune for Any Device

A tune is a rewritten set of instructions for the engine computer, changing things like fuel delivery, spark timing and shift behavior without swapping any physical parts. 5 Star writes this one for your truck and emails you the file, and you load it with a handheld device you already own.

why this one — At $300 this is the cheapest way into a genuine custom tune here, because you are paying for the calibration only and no hardware. That is also the condition: it assumes you already have a compatible device such as an SCT, DiabloSport or HP Tuners unit, which is a several hundred dollar purchase on its own. No power figure is published for it.