Melling Performance 10452 - Performance Oil Pump for 5.7L and 6.4L HEMI engines

Description

Made in the USA to the highest production standards, Melling high-performance oil pumps deliver dependable lubrication and maximum durability under the toughest RPM conditions. Engineered as a standard-volume, high-pressure performance upgrade over factory-style M452 and M462 oil pumps, this unit is built specifically for modern Chrysler, Dodge, Jeep, and Ram Gen III Hemi engines demanding elevated oil pressure stability. It features a hardcoat anodized cast aluminum body paired with a phosphate-coated cast iron cover to reduce friction, minimize wear, and eliminate housing deflection under load. Utilizing the latest gerotor technology with gears machined to close tolerances and precision-ground end plates, this pump delivers consistent oil control across the entire operating range. The internal pressure relief circuit features adjustable bypass pressure using the pre-installed higher-pressure relief spring (+20 PSI over M452 / +10 PSI over M462) or the supplied optional lower relief spring. Compatible with factory 1" diameter bolt-on pickup screens, every pump is individually bench-tested for flow and pressure under simulated engine running conditions before leaving the factory.

Features & Technical Highlights:

• Standard-Volume, High-Pressure Architecture: Engineered as a direct high-pressure performance upgrade for stock replacement M452 and M462 pumps, maintaining proper volume while raising oil pressure thresholds.
• Dual-Stage Relief Spring Tuning: Arrives pre-installed with a higher-pressure relief spring (+20 PSI over M452 / +10 PSI over M462) and includes an interchangeable optional lower-pressure relief spring to tailor system pressure to your engine's bearing clearances.
• Hardcoat Anodized Aluminum Housing: Precision CNC-machined body features a hardened anodized surface to resist internal bore wear, cavitation, and friction.
• Phosphate-Coated Cast Iron Cover: Rigid cast iron end plate eliminates plate deflection under elevated pressures and extends operating life.
• Advanced Gerotor Technology: Rotors and gears are machined to close tolerances for smooth, pulse-free fluid movement and efficient pressure buildup.
• Precision-Ground End Plates: Flat-ground to tight tolerances to provide maximum wear resistance against gear wear and galling.
• 1" Bolt-On Pickup Compatibility: Designed for seamless integration with factory-style 1" diameter bolt-on oil pickup tubes.
• 100% Factory Bench Tested: Individually tested for flow and pressure under simulated engine running conditions before packaging to ensure peak performance out of the box.