Compatible with 2021 RAM 1500 - 5.7L 8-Speed except E-Torque

Part Number: PKITDR578S21-I3

The DiabloSport inTune i3 Platinum + Unlocked PCM Kit is the complete tuning solution for the 2021 Ram 1500 5.7L HEMI. From the factory, these trucks ship with locked PCMs that prevent tuning. This package includes a DiabloSport Modified PCM and the inTune i3 Platinum handheld programmer (PN 8345), giving you everything you need to safely unleash your Ram’s full potential. Preloaded with dyno-tested performance calibrations, the inTune i3 Platinum delivers up to 30 rear-wheel horsepower gains, stronger torque, quicker throttle response, and refined 8-speed transmission behavior for faster, smoother shifts. These improvements provide more confident acceleration, towing strength, and daily drivability. The kit also allows for MDS (Multi-Displacement System) disable, keeping your HEMI in full V8 mode whenever you want maximum performance. For enthusiasts adding bolt-ons or advanced upgrades, the Platinum i3 supports CMR custom tuning, giving you access to DiabloSport’s nationwide network of tuners for dyno-proven calibrations tailored to your build. Built-in data logging and diagnostics make it simple to monitor and fine-tune your Ram’s performance. ⚠️ Important Note: On 2021+ models, you must save your stock calibration with your tuner before removing the factory PCM. Instructions are included for a smooth installation. For 2021 Ram 1500 5.7L HEMI owners who want real horsepower gains, MDS disable, and sharper drivability, the inTune i3 Platinum + Unlocked PCM Kit is the ultimate performance upgrade.

Features and Benefits

• 2022 Ram 1500 5.7 8 Speed
• Add 25-30 rwhp on premium fuel
• Supports custom tuning from our network of CMR tuners
• Disable MDS
• Adjust throttle response for optimal pedal feel
• Remove vehicle top speed limiter
• Adjust idle RPM
• Tunes for 87, 91 and 93 octane fuel included
• Performance TCM tune for 8 speed transmission included
• Includes PCM programmed to your vehicle and inTune 3!
• No vehicle downtime for tuning!
• Preloaded with multiple performance tunes
• Read/clear DTC codes
• Disable MDS for full time V8 operation!
• Adjust Rev Limiter in Drive/Neutral by +/- 500 RPM
• Disable Traction Control/ESP
• Raise or Lower Idle Speed by +/- 400 RPM
• Required bypass module or cable is included
• Speed Limiter On/Off enabling increased top speed
• Target Cooling Fan temps can be set from 150°-230° for use with cooler t-stat
• Tire Size Adjustment 20”-44”, allows for correcting speedometer for different tires
• WOT Fuel Adjustment – 1-7K RPM +/- 20%, allows for fine tuning Air/Fuel Ratio
• WOT MBT Spark 1-7K RPM +/- 10
• WOT Spark – 1-7k RPM +/- 10