ACL Bearings 4B4135AO/S2-.25 Connecting Rod Bearing Set Undersize - 25mm

The ACL Bearings 4B4135AO/S2-.25 is a precision-engineered connecting rod bearing set designed for high-performance engine builds and rebuilds. This set features a .25mm undersize specification, making it ideal for crankshaft journals that have been machined undersize during reconditioning or performance preparation.

Key Features:

• Precision .25mm undersize specification for machined crankshafts
• Advanced tri-metal construction with steel backing for superior strength
• High-performance polymer coating reduces friction and improves oil retention
• Engineered to meet or exceed OEM specifications
• Designed for optimal load distribution and fatigue resistance
• Compatible with high-RPM and forced induction applications

ACL Race Series bearings are manufactured using advanced metallurgy and coating technologies to provide exceptional durability under extreme loads and temperatures. The S2 designation indicates this bearing features ACL's premium race-grade coating system, providing enhanced protection during critical engine break-in periods and sustained high-performance operation. Each bearing set is precision-manufactured to exact tolerances, ensuring proper oil clearances and reliable engine performance.