GJYSYP

GJYSYP oil block off plugs are precision stainless-steel valley seals designed to permanently close AFM/DOD oil passages on non-AFM GM LSX and LT series engines (4.8L–6.2L, 2008–2023). These eight plug seals provide a durable, corrosion-resistant solution for sealing AFM oil circuits on applicable GM...

GJYSYP Oil Valley Seal Plugs are an 8-piece kit designed to plug AFM/DOD oil passages on genuine 2005–2019 Gen IV and Gen V valley covers, enabling conversion to a conventional LS-style lifter oiling setup. These precision-fit plugs are made for GM applications that use...