ACL Bearings 5M8443H-STD Race Series Tri-Metal Main Bearings

ACL Race Series Main Bearings are engineered for high-performance engines that demand durability under extreme RPM and load conditions. These tri-metal bearings feature advanced metallurgy and precision manufacturing to deliver superior reliability in racing and performance applications.

Key Features:

• High-strength overlay plate with reduced thickness for improved fatigue resistance and longevity
• Hardened steel backing provides enhanced support for the bearing lining and improves retention in the housing
• Increased crush ensures positive bearing retention and prevents spinning
• No flash plating on back maximizes heat transfer and improves grip between bearing and housing
• Increased eccentricity compensates for bore distortion at high RPM and promotes hydrodynamic oil film formation
• 3/4 groove design optimizes load-carrying surface area while maintaining proper oil flow to connecting rod bearings
• Tight wall tolerances enable consistent bearing clearances for precise engine assembly
• Enlarged ID chamfers accommodate large fillet radii found on performance crankshafts

Each set includes upper and lower bearing halves. ACL Race Series bearings are the choice of professional engine builders and racers who require proven performance and durability in demanding applications.