The MDS lifters are the ones that collapse to shut down cylinders under light load, and they are also the ones that most often tick, gall a cam lobe or set a misfire code when the engine has seen extended oil change intervals. Mopar supplies them as a matched assembly with the yoke that holds them in the bore, which is the correct way to service them. This is the rear position assembly.

Mopar Accessories 05038786AD MDS Hydraulic Roller Lifter and Yoke Assembly Features:

• Four hydraulic roller MDS lifters plus the retaining yoke, supplied as a kit.
• Rear position assembly for select 5.7L HEMI and 6.4L 392 HEMI engines.
• Original equipment profile matched to the factory camshaft lobes.
• Not intended for manual transmission 5.7L vehicles, which use non-MDS lifters.
• Supersedes 05038685AA, 05038786AA, 05038786AB, 05038786AC and 68060715AA among others.