Melling Performance 10355HV - High Performance Oil Pump for GM 5.3L, 6.0L, 6.2L Engines.

Description

Made in the USA to the highest production standards, Melling performance oil pumps deliver dependable lubrication and maximum durability under the toughest RPM conditions. Engineered as the dedicated high-performance upgrade for the M365HV, this pump delivers a 20% increase in volume over the standard M355, M365, and 10355 oil pumps. It is purpose-built to provide extra oil volume displacement for demanding performance platforms, high-mileage engines, remote oil coolers, and looser bearing clearances. Featuring a CNC-machined, hardcoat anodized cast aluminum body paired with a phosphate-coated cast iron cover, it significantly reduces internal friction and maximizes pump wear resistance under heavy operating loads. The internal pressure relief valve incorporates a serviceable threaded screw-in valve plug rather than a press-fit cup plug and includes an optional +20% PSI pressure relief spring to fine-tune system oil pressure. Compatible with standard 7/8" diameter bolt-on pickup screens, every pump is individually bench-tested for pressure and flow under simulated engine operating conditions prior to packaging.

Features & Technical Highlights:

• 20% High-Volume Increase: Displaces 20% more oil volume than M355, M365, and 10355 pumps, making it the ideal high-flow upgrade for engines with external oil coolers, remote filters, or looser performance bearing clearances.
• Engineered Upgrade for M365HV: Direct high-performance evolution of the popular M365HV wet-sump oil pump.
• Hardcoat Anodized Aluminum Body: Precision CNC-machined aluminum housing features a durable hardcoat anodized surface to resist internal bore wear, galling, and rotor friction.
• Phosphate-Coated Cast Iron Cover: Rigid cast iron end plate eliminates housing flex under elevated pressures to promote long-term stability and component life.
• Threaded Relief Valve Plug: Incorporates a secure, serviceable screw-in valve plug (replacing press-in cup plugs) to safely retain the relief valve mechanism.
• Adjustable Pressure Relief Spring: Includes an optional +20% PSI pressure relief spring to tailor system oil pressure to your build's specific lubrication requirements.
• Standard 7/8" Screen Fitment: Engineered to bolt up directly to standard 7/8" diameter bolt-on oil pickup tubes.
• Precision Gerotor & Ground End Plates: Manufactured with tight gear tolerances and precision-ground end plates for efficient, pulse-free operation and maximum wear resistance.
• 100% Factory Bench Tested: Individually tested for pressure and flow under simulated engine operating conditions prior to shipment.