ACL Bearings 4B1931-.25 Connecting Rod Bearing Set Undersize - 0.25mm

The ACL Bearings 4B1931-.25 is a precision-engineered connecting rod bearing set designed for high-performance engine builds and rebuilds. This bearing set features a 0.25mm (0.010") undersize specification, making it ideal for crankshaft journals that have been machined or require oversized bearings for proper clearance.

Key Features:

• Precision tri-metal construction for superior durability and load capacity
• 0.25mm undersize for machined crankshaft journals
• Advanced polymer coating reduces friction and improves oil retention
• Engineered clearances for optimal oil flow and heat dissipation
• Strict quality control ensures consistent dimensions and performance
• Complete set includes all necessary bearing shells for one connecting rod

ACL Bearings are manufactured to OEM specifications and beyond, utilizing high-quality materials and modern bearing technology. The tri-metal construction combines a steel backing with aluminum alloy bearing material and a specialized overlay for excellent wear resistance and conformability. This bearing set is suitable for both street and performance applications where precision and reliability are essential.