ACL Bearings 4B2821-STD Standard Size Connecting Rod Bearing Set

The ACL Bearings 4B2821-STD is a standard size connecting rod bearing set engineered for performance and reliability. ACL Race Series bearings are manufactured to exacting tolerances and feature advanced tri-metal construction designed to withstand the demanding conditions of high-performance and racing applications.

Key Features:

• Hardened steel backing provides superior strength and improves bearing retention in the housing
• High-strength overlay plate with reduced thickness for enhanced fatigue resistance
• Increased crush for improved bearing retention and heat dissipation through higher radial contact pressure
• Elimination of flash plating on bearing backs maximizes heat transfer and grip
• Increased eccentricity compensates for bore distortion at high RPM and assists hydrodynamic oil film formation
• Tight, consistent wall tolerances help maintain precise bearing clearances
• Enlarged ID chamfers accommodate large fillet radius on performance crankshafts where required

ACL bearings are trusted by engine builders worldwide and are standard equipment in championship-winning race engines across multiple motorsports disciplines. The unique combination of metallurgy, precision engineering, and advanced design provides the endurance and capability needed for extreme performance applications.