Jeep Grand Cherokee 5.7L HEMI MoPower Custom Tune with Livernois MyCal Handheld

The Jeep Grand Cherokee 5.7L HEMI is known for blending capability with performance, and MoPower Calibrations makes it even better with our custom ECU tune. Bundled with the Livernois MyCal handheld programmer, this package provides dyno-proven horsepower and torque gains, improved throttle response, and optimized drivability — all while maintaining OEM reliability.

Dyno-Proven Performance

Our engineers refined spark, fueling, torque management, and knock thresholds during extensive dyno and road testing. The result is stronger low-end torque for towing, sharper throttle response for daily driving, and more power across the RPM range without sacrificing dependability.

MoPower Jeep 5.7L HEMI Tune Features

• Dyno-verified horsepower & torque gains
• Sharper throttle response and improved drivability
• Stronger low-end torque for towing & hauling
• Optimized spark and fuel mapping
• Modified torque management for stronger delivery
• Refined knock thresholds for safe, consistent output
• Potential gains in fuel economy during light driving

Plug-and-Play with Livernois MyCal

The Livernois MyCal handheld programmer makes tuning simple and convenient. Flash your ECU directly through the OBDII port — no downtime, no mailing in your ECU. Switch between stock and performance tunes anytime.

Fuel Options

This tune is designed for premium fuel and supports:

• 91 Octane
• 92 Octane
• 93 Octane

⚠️ Running lower octane fuel than your tune requires may cause engine damage. MoPower assumes no liability for incorrect fuel usage.

Important Disclaimer

MoPower Calibrations are sold for off-road use only. All performance Calibrations and Engine Control Units installed are at the customer’s own risk. MoPower Calibrations or www.mo-power.com holds no responsibility either implied or otherwise for mechanical, electrical, or other failure when using any aftermarket performance products from MoPower Calibrations. Items sold for off-road use only are illegal in many states and provinces and are intended for racing vehicles which may never be used on a public road or highway. Not for sale or use in the State of California.

MoPower Calibrations LLC is not affiliated, associated, authorized, endorsed by, or in any way connected with Diablosport, HPTuners, or SCT (Derive) or any of their subsidiaries or affiliates. The names Diablosport, HPTuners, and SCT, as well as related names, marks, emblems, and images, are registered trademarks of their respective owners.

The MoPower Difference

Enhance the performance of your Jeep Grand Cherokee 5.7L HEMI with a MoPower Custom Tune and Livernois MyCal handheld. Enjoy sharper throttle response, more torque, and dyno-proven horsepower gains — perfect for street, towing, or trail.