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Set of 16 US MFG Eaton DFM Lifters for 2019+ Chevy GM 5.3 and 6.2 Engines with Dynamic Fuel Management, or DFM, Engines. These lifters are constructed differently than the older style AFM lifters.  The DFM System is different in that any combination of cylinders can be shut down as opposed to the AFM system where 4 cylinders would shut down. Problems with the AFM Engines have hopefully been resolved with the new DFM design. The links below are related to the older AFM Design and can be used for reference until DFM Videos become available.  AFM Lifter failures in GM engines are the result of another problem in the engine. They are not the cause of the failure. That problem needs to be resolved as part of the repair or repeated lifter failures will occur. Please read the tech bulletin in images and watch the videos in the links below: Click here for the video from Melling  Click here for a video from GM