Oil Galley Plug GM LS Gen III/IV 08-19

The Melling Oil Galley Plug for GM LS Generation III/IV engines (2008–2019) is a vital internal engine component designed to seal and regulate oil flow through the engine block's gallery system. This precision-engineered plug is essential for maintaining proper lubrication distribution to internal components, preventing oil leaks, and ensuring reliable engine performance during high-RPM operation and demanding driving conditions.

Manufactured by Melling, a trusted name in engine internals and OEM-quality components, this oil galley plug is engineered to withstand the pressurized oil circulation demands of LS Gen III and Gen IV platforms. Its compact design ensures direct fitment without modification or clearance issues, while Melling's precision manufacturing tolerances guarantee a reliable seal that prevents internal oil weeping, which can lead to low-pressure conditions and inadequate bearing lubrication.

This plug is an ideal replacement for any LS engine builder, performance shop, or enthusiast performing top-end engine work, valve train service, or complete engine assembly. If you're rebuilding a Gen III or Gen IV LS engine—whether naturally aspirated, turbocharged, or supercharged—proper oil gallery sealing is crucial for longevity and performance.