ACL Race Series Main Bearing Set

2003–2025 Chrysler 300C, Dodge Magnum, Jeep Grand Cherokee, Dodge Charger, Dodge Challenger, Dodge Durango 5.7L & 6.1L HEMI V8

Part #: 5M2220H-.025

Overview

The ACL Race Series Main Bearing Set is engineered specifically for Chrysler 5.7L and 6.1L HEMI V8 engines, covering a wide range of vehicles from 2003 through 2025. Designed for professional engine builders and serious enthusiasts, this bearing set offers a precise .025mm (0.001") undersize fit to accommodate crankshaft wear or grinding. It delivers exceptional durability and reliability under high-performance and extreme operating conditions, making it an ideal choice for street performance builds, race engines, and heavy-duty rebuilds.

Compatible with popular models such as the Dodge Ram 1500, Chrysler 300C, Dodge Magnum, Jeep Grand Cherokee, Dodge Charger, Dodge Challenger, and Dodge Durango, these bearings ensure optimal engine integrity and power output by maintaining tight clearances and superior wear resistance.

Key Features

ACL Race Series bearings utilize advanced materials and manufacturing processes to provide outstanding performance and longevity. Key features include:

• Precision-engineered to .025mm (0.001") undersize for exact crankshaft journal fitment
• Constructed from high-grade tri-metal materials for enhanced wear resistance and durability
• Optimized for high load capacity and excellent thermal stability in demanding environments
• Designed to reduce friction and improve oil film retention, extending engine life
• Manufactured to meet or exceed OEM specifications for reliable, consistent performance
• Corrosion-resistant coating protects against engine contaminants and installation damage
• Ideal for both street and track applications requiring high durability and precision

Construction & Design

Each ACL Race Series main bearing features a tri-metal construction combining a robust steel backing with a copper-lead alloy layer and a thin babbitt overlay. This multi-layer design provides a durable bearing surface capable of withstanding the high loads and elevated temperatures typical of performance HEMI engines. The precise .025mm undersize dimension ensures a tight, secure fit on the crankshaft journals, minimizing clearance and maximizing oil film strength for superior lubrication.

Rigorous quality control and finishing processes guarantee smooth bearing surfaces and consistent thickness, critical for maintaining proper oil clearance and preventing premature wear. The corrosion-resistant coating further enhances durability by protecting the bearing surface from contaminants and handling damage during installation.

Installation & Fitment

The ACL Race Series Main Bearing Set is a direct replacement for Chrysler 5.7L and 6.1L HEMI V8 engines from 2003 to 2025. Installation requires standard engine rebuild procedures, including precise measurement of crankshaft journal diameters and bearing clearances to ensure optimal fitment. The .025mm undersize specification accommodates crankshaft grinding or wear, making these bearings suitable for both rebuilds and performance upgrades.

Proper lubrication during assembly and adherence to torque specifications are essential to maximize bearing life and maintain engine reliability. This bearing set fits the following vehicles:

• 2003–2025 Dodge Ram 1500 5.7L HEMI
• 2005–2008 Dodge Magnum 5.7L HEMI
• 2005–2010 Chrysler 300C 6.1L SRT8
• 2005–2010 Dodge Magnum 6.1L SRT8
• 2005–2021 Jeep Grand Cherokee 5.7L HEMI & 6.1L SRT8
• 2006–2025 Dodge Charger 5.7L HEMI & 6.1L SRT8
• 2008–2025 Dodge Challenger 5.7L HEMI & 6.1L SRT8
• 2021–2025 Dodge Durango 5.7L HEMI

What's Included

• Complete set of main bearings sized at .025mm undersize
• Precision-matched bearing shells for all main journals
• Installation instructions and specifications guide

Ideal For

This bearing set is perfect for automotive enthusiasts, professional engine builders, and racers who demand high reliability and performance from their Chrysler HEMI V8 engines. It is especially suited for engine rebuilds, performance upgrades, and motorsport applications where enhanced bearing durability and precise fitment are critical to withstand increased power and stress.