EFILive tuning for the 2007.5-2009 Cummins is now available to meet your desired horsepower gains. Each AutoCal will come with 5 tunes. When you purchase a GDP Tuning AutoCal you will be ready to unleash the beast that’s is locked inside of your truck.
2007.5-2009 6.7L Cummins tunes are configured in CSP-5 format. This configuration allows two different methods of power level adjustment.