2017-2023 GM 6.6L L5P & L5D Duramax | Optional Engine Calibration Only By PPEI

CARB EO Pending Designed specifically for customers who want to disable the factory speed limiter, improve throttle response sensitivity and those customers with aftermarket fuel systems such as a Fass Fuel System that require a specific calibration to enable compatibility.   This calibration is designed for both L5P & L5D vehicles. This PPEI calibration does not include any power enhancements or horsepower increase. Please reference the other L5P or L5D product that has a base price of $799 for the PPEI calibration that increased power and performance of the vehicle.