For Non-AFM GM Engines LSX Series Engines: LS1, LS2, LS3, LS7, etc. (2008-2023), LT Series Engines: LT1, LT4, LT5, etc. (2008-2023), Valley Seal Plugs to support 4.8L, 5.3L, 6.0L, and 6.2L displacements, Quantity of 8 AFM/DOD Plugs for 2008-2023 non-AFM GM engines. Can be used to seal AFM oil passages under the VLOM plate. Plugs are installed by gently tapping the plug into the oil passage hole. Once installed, the plug should be flush with the bottom edge of the bung. If the plug needs to be removed, the top is designed with 4 mm x 0.7 thread size threaded holes for easy removal.