Melling 10355 High-Volume / High-Pressure Oil Pump

The Melling 10355 is the go-to performance upgrade for late-model GM LS engines. Designed as a high-performance alternative to the M365, this pump offers a 33% increase in oil volume and a 10 psi pressure increase over standard specifications.

We specifically recommend the 10355 for LSA engine builds where the factory piston oil squirters are being retained, ensuring you have the volume necessary to maintain rock-solid oil pressure under load.

Key Technical Features

• Performance Build: Features are hard-coat anodized aluminum body and a cast iron phosphate-coated cover for maximum durability and reduced wear.

• Steel Rotors: Built to withstand high-RPM conditions and provide dependable flow.

• Adjustable Pressure: Includes an optional +20 psi spring so you can tailor the pressure to your specific engine build.

• Precision Tested: Every Melling pump is individually tested for flow and pressure under real-world engine operating conditions before leaving the factory.

Fitment & Compatibility

• Direct Replacement: Fits GM L76, L77, and LSA engines.

• Pickup: Designed for a standard 7/8" diameter bolt-on pickup screen (O-ring included).

⚠️ Critical Installation Note

Do NOT use this pump in VT–VZ chassis running the stock 5.7L sump. > Because of the 33% increase in volume, the factory 5.7L sump can be pumped dry under high-demand conditions. If installing in these vehicles, you must upgrade to a higher-capacity sump to handle the extra oil volume safely.

Product Specifications

• Volume: 33% Increase over stock (and 10295 series)

• Pressure: High Pressure (+10 psi over stock; optional +20 psi spring included)

• Housing: Anodized Cast Aluminum

• Cover: Phosphate Coated Cast Iron

• Drive Type: Crankshaft

• Pickup Tube Diameter: 0.875" (22mm)

• Origin: Made in the USA

Includes: High-pressure pump, optional pressure relief spring, and O-ring for screen installation.