King Engine Bearings Main Bearing Set

2000–2025 Chrysler 300, Dodge Challenger, Dodge Charger, Dodge Magnum, Jeep Grand Cherokee, Jeep Grand Wagoneer, Jeep Wagoneer, Ram 1500/2500/3500 Gen III HEMI 5.7L, 6.1L, 6.4L

Part #: MB5840MC0.5

Overview

The King Engine Bearings Main Bearing Set is precision-engineered for Chrysler and Dodge Gen III HEMI engines, including the 5.7L, 6.1L, and 6.4L variants. Designed with a +0.50mm oversize specification, this bearing set is ideal for engine rebuilds or performance upgrades requiring exacting tolerances and enhanced durability. King Engine Bearings is a trusted name in high-quality engine components, delivering reliable performance under demanding conditions.

This main bearing set is perfect for professional engine builders, mechanics, and automotive enthusiasts who demand dependable bearings that maintain tight clearances and resist wear. Whether restoring a classic muscle car or upgrading a modern HEMI-powered vehicle, these bearings provide the strength and consistency needed for long-lasting engine performance.

Key Features

King Engine Bearings combines advanced materials and manufacturing processes to ensure superior protection and performance. Key features include:

• Precision machined to +0.50mm oversize for accurate fitment in rebuilt or modified Chrysler/Dodge Gen III HEMI engines
• Specifically engineered for 5.7L, 6.1L, and 6.4L HEMI engines
• Durable tri-metal construction offering excellent fatigue resistance and high load capacity
• Optimized surface finish reduces friction and wear under high-load conditions
• Meets or exceeds OEM specifications for proper oil clearance and bearing crush
• Manufactured under strict quality control standards for consistent, reliable performance
• Designed to withstand the rigors of street, track, and performance applications

Construction & Design

The King Main Bearing Set features a tri-metal design consisting of a robust steel backing, a copper-lead intermediate layer, and a thin overlay of a soft metal alloy. This combination provides an optimal balance of strength, conformability, and embedability, allowing the bearings to accommodate minor debris while maintaining a stable oil film. The +0.50mm oversize ensures proper clearance when crankshaft journals have been machined or polished during engine rebuilding.

Each bearing is manufactured to meet or exceed OEM tolerances, ensuring a precise fit that supports smooth crankshaft rotation and minimizes the risk of premature wear or failure. The surface finish is carefully optimized to reduce friction and heat generation, contributing to improved engine efficiency and longevity.

Installation & Fitment

Installation of the King Main Bearing Set follows standard engine rebuilding procedures. It requires accurate measurement of crankshaft journal diameters and bearing clearances to ensure proper fitment. These bearings are designed for Chrysler and Dodge Gen III HEMI engines with 5.7L, 6.1L, and 6.4L displacements machined to +0.50mm oversize specifications.

Proper installation includes thorough cleaning of all components, application of assembly lubricant, and torquing main caps to manufacturer specifications. No additional modifications are necessary beyond standard machining and clearance checks. This set is suitable for professional engine builders and experienced enthusiasts performing rebuilds or performance upgrades.

What's Included

• Main bearing shells sized +0.50mm for Chrysler/Dodge Gen III HEMI 5.7L, 6.1L, and 6.4L engines
• Complete set for all main bearing positions
• Packaging and documentation from King Engine Bearings

Ideal For

• Engine rebuilders restoring Chrysler/Dodge Gen III HEMI engines
• Performance enthusiasts upgrading to oversize bearings for enhanced durability
• Professional shops requiring reliable, OEM-quality replacement bearings
• Applications involving street performance, racing, or heavy-duty use

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.