Melling Engine Oil Pump for GM LS-Series — 7/8" Inlet, High-Volume High-Pressure Wet-Sump Replacement

Melling's internal, wet-sump engine oil pump delivers high-volume, high-pressure oil flow tailored for GM LS-series motors.

This precision-machined replacement oil pump is built to restore or upgrade lubrication delivery in LS-series gasoline engines. Designed with a 7/8-inch inlet and engineered for wet-sump applications, it supplies increased flow and pressure compared with many standard OE units. The pump ships individually and fits engines that accept the Melling LS-series internal pump footprint.

How does this pump improve oil delivery in my LS engine?

The Melling high-volume, high-pressure pump increases oil flow and raises operating pressure where the engine demands it, helping maintain consistent lubrication under load. Its internal construction is optimized for wet-sump systems and the 7/8-inch inlet supports robust oil supply from the pan.

• Higher internal displacement for increased oil throughput
• Raised pressure profile for improved bearing film strength
• 7/8 in inlet to ensure steady oil pickup from the sump
• Precision fit for GM LS-series internal pump housings

What are the key specs and physical dimensions I should know?

This pump is an individual replacement unit packaged at approximately 8.03 x 5.98 x 5.28 inches and weighs about 2.78 pounds. It’s a compact, internal wet-sump pump designed for direct installation where the LS-series internal pump pattern and inlet size match.

• Item type: internal, wet-sump oil pump
• Inlet size: 7/8 inch
• Shipping/package dimensions: ~8.03 x 5.98 x 5.28 in
• Package weight: ~2.78 lb; sold as a single unit

Will this pump work for performance or street-driven LS builds?

The pump is suitable for street and performance applications where increased oil flow and pressure are desired. While it boosts lubrication capacity, final selection should match your engine’s bearing clearances, clearances and cam/valvetrain demands to avoid over-pressurizing sensitive components.

• Good fit for high-rev and turbocharged LS builds needing extra flow
• Compatible with wet-sump lubrication setups typical in street cars
• Sold as a single engine pump for one motor installation
• Installation may require confirmation of pickup tube and pressure relief compatibility

Who is this for: Technicians, engine builders and experienced DIYers installing or upgrading lubrication systems on GM LS-series engines will appreciate this Melling pump. It targets users replacing worn stock pumps or upgrading to support higher performance demands, provided they verify fitment and integrate the pump into an appropriate oiling system and relief valve setup.