King Engine Bearings Main Bearing Set

Fits Most Chrysler/Dodge/Jeep/Ram 6.4L/6.2L/6.1L (05-25)

Part #: MB5840SI0.75

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 to provide reliable crankshaft support, this bearing set ensures smooth rotation and optimal engine longevity under both daily driving and high-performance conditions. Whether you are rebuilding, upgrading, or repairing your engine, these bearings maintain critical clearances and reduce friction to protect your investment and enhance durability.

Trusted by professional mechanics and automotive enthusiasts alike, King Engine Bearings deliver dependable performance that meets or exceeds OEM standards. This set is an ideal choice for maintaining engine reliability and extending service life in demanding applications.

Key Features

King Engine Bearings are known for their advanced materials and meticulous manufacturing processes. This main bearing set offers:

• Bimetal construction with an aluminum-silicon alloy base for superior strength and fatigue resistance
• Optimized surface finish to minimize friction and improve oil film retention
• Precision sizing to ensure exact fitment and maintain proper crankshaft clearances
• Compatibility with Chrysler and Dodge Gen III HEMI engines: 5.7L, 6.1L, and 6.4L
• Enhanced load-carrying capacity suitable for high-performance and heavy-duty use
• Corrosion-resistant coating to protect against wear and extend bearing life
• Manufactured to meet or exceed OEM specifications for consistent, reliable performance

Construction & Design

This main bearing set features a bimetal design combining an aluminum-silicon alloy base layer with a durable overlay. The aluminum-silicon base provides excellent fatigue strength and conformability, creating a lightweight yet robust foundation. The overlay ensures smooth operation by reducing wear and maintaining a stable oil film between the bearing and crankshaft.

King Engine Bearings utilize advanced manufacturing techniques to achieve tight tolerances and consistent quality. This precision engineering supports the crankshaft effectively under varying loads and RPMs, contributing to improved engine reliability and longevity.

Installation & Fitment

The King Engine Bearings Main Bearing Set is designed for direct replacement in Chrysler and Dodge Gen III HEMI engines, including 5.7L, 6.1L, and 6.4L displacements. Installation follows standard engine rebuild procedures, including thorough cleaning of bearing surfaces, inspection of crankshaft journals for wear or damage, and verification of bearing clearances using plastigage or micrometers.

No modifications are required when replacing OEM bearings with this set, making it a straightforward upgrade or repair solution. Proper installation ensures optimal bearing performance and contributes to long-term engine durability.

What's Included

• Main bearing shells sized to 0.75mm undersize
• Thrust bearings as required for Gen III HEMI engines
• Packaging and detailed installation instructions

Ideal For

This main bearing set is perfect for automotive enthusiasts, professional engine builders, and mechanics working on Chrysler and Dodge Gen III HEMI engines. Whether performing a complete engine rebuild, upgrading to performance components, or replacing worn bearings, this set offers a reliable solution that balances durability with precision engineering. It suits applications ranging from daily driving to moderate performance builds, ensuring dependable crankshaft support and extended engine life.

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.