DiabloSport PCM-DR578S15 Modified PCM

The DiabloSport Unlocked PCM is required to unleash the tuning potential of your 2015 Ram 1500 5.7L HEMI. From the factory, these trucks come equipped with locked PCMs that block aftermarket tuning. By upgrading to a DiabloSport Modified PCM, you open the door to installing performance tunes with compatible DiabloSport devices such as the inTune i3 or Trinity T2 Platinum. When paired with a DiabloSport tuner, this unlocked PCM enables you to load dyno-proven calibrations that deliver 25–30 RWHP gains, stronger torque, sharper throttle response, and refined transmission behavior for smoother, quicker shifting. These improvements make your Ram more powerful, more responsive, and more capable whether you’re towing, daily driving, or just looking for more excitement behind the wheel. ⚠️ Important Notes: A compatible DiabloSport tuner is required (sold separately). Modified PCMs are not compatible with other tuning brands. Installation is straightforward using DiabloSport’s cross-shipment process. For 2015 Ram 1500 HEMI owners ready to unlock horsepower, torque, and drivability gains, the DiabloSport Unlocked PCM is the foundation for real performance improvements.