King Engine Bearings Main Bearing Set

2005–Present Chrysler / Dodge Gen III HEMI 5.7L, 6.1L, 6.4L Engines

MB5840MC0.75

Overview:

The King Engine Bearings Main Bearing Set is engineered specifically for Chrysler and Dodge Gen III HEMI engines, including the 5.7L, 6.1L, and 6.4L variants. Designed with precision and durability in mind, this main bearing set is ideal for engine builders, performance enthusiasts, and professional mechanics seeking reliable, high-quality components for engine rebuilds or upgrades.

Featuring a +0.75mm size, these bearings provide the necessary clearance for engines requiring oversized main bearings, ensuring optimal oil flow and reduced friction under demanding conditions. King Engine Bearings is renowned for delivering products that meet or exceed OEM specifications, making this set a trusted choice for maintaining engine longevity and performance.

Key Features:

This main bearing set combines advanced materials and manufacturing techniques to offer dependable performance and protection for your engine’s rotating assembly. Key features include:

• Precision-machined to +0.75mm oversize for proper fitment in engines with worn or modified crankshafts
• Constructed from high-quality bearing alloys for enhanced wear resistance and durability
• Optimized oil clearance design to maintain consistent lubrication and reduce friction
• Manufactured to meet or exceed OEM specifications for Chrysler and Dodge Gen III HEMI engines
• Compatible with 5.7L, 6.1L, and 6.4L HEMI engines, covering a wide range of performance applications
• Engineered to withstand high RPM and increased loads common in performance and racing environments
• Corrosion-resistant coating to protect against rust and extend service life
• Includes all main bearings required for a complete engine rebuild or upgrade

Construction & Design:

King Engine Bearings utilizes premium bearing alloys that balance strength, fatigue resistance, and conformability. The +0.75mm sizing accommodates crankshaft journal undersize conditions, ensuring a precise fit and optimal oil film thickness. The bearings are engineered with a tri-metal construction, typically featuring a steel backing, a copper-lead intermediate layer, and a soft overlay to provide excellent embedability and compatibility with crankshaft surfaces.

Each bearing undergoes rigorous quality control and dimensional inspection to guarantee consistent thickness and roundness. The design focuses on maximizing load capacity while minimizing wear, making these bearings suitable for both street-driven and high-performance engines.

Installation & Fitment:

Installation of the King Engine Bearings Main Bearing Set requires standard engine rebuilding procedures, including proper cleaning of the crankshaft and bearing surfaces, precise measurement of journal diameters, and verification of oil clearances with plastigage or micrometers. The +0.75mm size is intended for crankshafts that have been machined undersize by 0.75mm, so it is critical to confirm compatibility before installation.

This bearing set fits Chrysler and Dodge Gen III HEMI engines from 2005 onward, including the 5.7L, 6.1L, and 6.4L displacements. No modifications to the engine block or crankshaft are typically required beyond standard machining and cleaning.

What's Included:

• Main bearings sized +0.75mm for all main journals
• Thrust bearings as required for Gen III HEMI engines
• Installation instructions and specifications (where applicable)

Ideal For:

This main bearing set is ideal for engine builders and performance enthusiasts rebuilding or upgrading Chrysler and Dodge Gen III HEMI engines. Whether restoring a factory engine, preparing a performance build, or maintaining a high-mileage vehicle, these bearings provide the reliability and precision needed to ensure smooth engine operation and longevity.

King Engine Bearings specializes in engine bearings with a strong footprint in performance and racing, developing advanced bearing materials and designs for high-load engines. Builders and racers rely on King for main and rod bearings engineered to handle higher cylinder pressures and sustained RPM without sacrificing reliability.