ACL Bearings 4B745P-30 Connecting Rod Bearing Set Undersize - 030

The ACL Bearings 4B745P-30 is a high-performance Race Series connecting rod bearing set engineered for demanding applications. This set features advanced tri-metal construction with a hardened steel backing layer, copper-lead alloy intermediate layer, and a high-strength overlay plate designed to withstand extreme loads and elevated RPM conditions.

Key Features:

• Tri-metal construction with hardened steel backing for superior bearing retention and lining support
• High-strength overlay plate with reduced thickness for improved fatigue resistance
• Increased crush for enhanced bearing retention and improved heat dissipation
• Elimination of flash plating on bearing backs to maximize heat transfer and housing grip
• Increased eccentricity to compensate for bore distortion at high RPM and assist hydrodynamic oil film formation
• Precision manufactured to exact tolerances for reliable fit and consistent clearances
• .030" undersize specification for crankshafts machined to accommodate bearing replacement

ACL Race Series bearings are trusted by professional engine builders and racers worldwide, from drift racing and drag racing to NASCAR and NHRA competition. The combination of precision engineering, advanced metallurgy, and race-proven design delivers the durability and performance required for high-output engines.