This is only for existing users of TunerCat's OBD2Tuner program - if you do not already own TunerCat please look at one of the other TunerCat offerings. All your existing definitions (VDF files)will work with the RTOBD2 software. If you need an additional definition to go along with this, check out one of the other TunerCat options in this section. This will work with any number of Roadrunner-equipped PCMs (not RR serial locked).
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