Melling LS-Series Internal Oil Pump 10295 — Standard Volume, High-Pressure +25psi Option

The Melling 10295 is a high-pressure, internal wet-sump oil pump designed for GM LS-series engines, delivering stock volume with increased pressure for improved oiling reliability.

This internally mounted oil pump suits GM LS-family applications that require a dependable increase in system pressure while retaining standard oil flow. Built with high-pressure gearing and supplied with an optional +25 psi spring for race-specific COPO Camaro setups, it improves oil delivery without changing reservoir volume. It fits engines using a 7/8-inch inlet screen and bolts in place of factory units for a straightforward replacement.

How does the 10295 change oil pressure and flow on my LS engine?

The 10295 raises oil system pressure while maintaining the factory volume rate, providing firmer oiling performance under load without reducing flow. Compared with the M295, this pump produces roughly a 10 psi higher pressure at comparable operating speeds, making it useful for engines that benefit from higher oil pressure.

• High-pressure internal gear design for increased system PSI.
• Standard-volume displacement to preserve factory oil flow.
• Approximately +10 psi over M295 at similar RPMs.
• Optional +25 psi spring included for specific high-pressure needs.

Will the pump fit my LS engine and what mounting hardware does it use?

The unit is engineered for GM LS-series wet-sump blocks and installs in the same location as the OEM internal pump. It accepts the common 7/8-inch diameter bolt-on pickup screen and matches standard bolt patterns for a direct-fit swap in most LS applications.

• Designed for GM LS-series internal wet-sump applications.
• Uses a 7/8" diameter bolt-on pickup screen for compatibility.
• Standard bolt pattern for straightforward installation.
• Fits typical LS block pump mounting without case modification.

What racing or street uses benefit from the optional +25 psi spring?

The included +25 psi spring is meant for extreme high-demand scenarios where extra oil pressure helps preserve stability under severe conditions, for example in high-revving or hard-accelerating COPO Camaro engines. Use of the spring raises peak pressure but should be paired with proper oiling system checks to avoid over-pressurizing delicate components.

• Useful for COPO Camaro and similar race-prepped LS builds.
• Provides temporary high-pressure capability when required.
• Installable or removable depending on tuning needs.
• Recommend pressure gauge verification after spring installation.

What are the practical advantages of choosing this Melling pump over a low-pressure or non-upgraded replacement?

Choosing the Melling 10295 gives stronger oil pressure without changing oil volume, which helps protect bearings and valvetrain components under heavier loads and elevated RPMs. It’s engineered as a durable drop-in upgrade that balances everyday drivability with improved protection for performance use.

• Higher oil pressure improves lubrication stability at speed and temperature.
• Maintains stock oil volume for predictable engine behavior.
• Durable internal design suited for performance and street engines.
• Direct-fit replacement reduces installation time and complexity.

Who is this for: The Melling 10295 oil pump is intended for GM LS-series owners wanting a reliable, higher-pressure internal pump without altering oil volume—ideal for high-performance street cars, track machines that retain wet-sump systems, and builders of COPO-spec engines requiring the supplied high-pressure spring. It’s a practical upgrade when you want improved oiling confidence with a simple, OEM-style installation.