King Engine Bearings Main Bearing Set

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

MB5840SI

Overview:

The King Engine Bearings Crankshaft 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 to meet the demanding requirements of high-performance and daily-driven vehicles, this main bearing set ensures reliable crankshaft support and smooth engine operation. Ideal for engine rebuilds, upgrades, or maintenance, these bearings provide the durability and precision needed to maintain optimal engine health under various driving conditions.

Built with a bimetal construction featuring an aluminum-silicon base, these bearings offer excellent wear resistance and conformability, helping to extend engine life and reduce the risk of premature failure. Whether you are a professional mechanic or an enthusiast performing your own engine work, King Engine Bearings delivers a trusted solution for your Chrysler/Dodge Gen III HEMI powerplants.

Key Features:

King Engine Bearings main bearings combine advanced materials and manufacturing techniques to provide dependable performance and longevity. Key features include:

• Bimetal construction with an aluminum-silicon base for superior wear resistance
• Precision-machined to OEM specifications for exact fit and optimal clearance
• Designed specifically for Chrysler/Dodge Gen III HEMI 5.7L, 6.1L, and 6.4L engines
• Enhanced conformability to accommodate slight crankshaft imperfections
• Excellent fatigue strength to withstand high loads and RPMs
• Corrosion-resistant surface treatment for extended durability
• Compatible with both stock and performance engine builds
• Manufactured under strict quality control standards to ensure consistency

Construction & Design:

The King main bearings utilize a bimetal design featuring an aluminum-silicon alloy base layer bonded to a steel backing. This combination provides a balance of strength, flexibility, and wear resistance essential for supporting the crankshaft under dynamic engine loads. The aluminum-silicon layer offers excellent conformability and embedability, allowing the bearing to adapt to minor crankshaft surface irregularities and trap contaminants without damage.

The steel backing ensures structural integrity and dimensional stability, preventing deformation during installation and operation. Precision manufacturing processes guarantee tight tolerances and consistent thickness, which are critical for maintaining proper oil clearance and preventing bearing failure. This robust construction makes King Engine Bearings a reliable choice for both factory replacement and high-performance applications.

Installation & Fitment:

Installation of the King Engine Bearings main bearing set is straightforward for experienced mechanics and engine builders. These bearings are designed as direct replacements for the main bearings in Chrysler and Dodge Gen III HEMI 5.7L, 6.1L, and 6.4L engines, ensuring proper fitment without the need for modifications. It is essential to follow manufacturer torque specifications and use proper assembly lubricants during installation to achieve optimal performance and longevity.

Always inspect the crankshaft journals for wear or damage before installation, and measure bearing clearances with precision tools to confirm correct tolerances. Proper installation will help prevent premature bearing wear and maintain smooth engine operation.

What's Included:

• Complete set of main bearings for Chrysler/Dodge Gen III HEMI 5.7L, 6.1L, and 6.4L engines
• Upper and lower bearing shells sized for precise crankshaft fitment
• Packaging and instructions for identification and installation guidance

Ideal For:

This main bearing set is ideal for automotive enthusiasts, professional engine builders, and mechanics performing engine rebuilds or upgrades on Chrysler and Dodge Gen III HEMI engines. It suits applications ranging from daily drivers to performance vehicles requiring reliable crankshaft support and enhanced durability. Whether restoring a classic HEMI or building a high-output engine, King Engine Bearings provides the quality and precision needed for dependable operation.

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.