ACL Bearings 4B1925HD-.025 Race Series Rod Bearing Set 0.025" Oversize

The ACL Bearings 4B1925HD-.025 is a high-performance Race Series connecting rod bearing set designed for Honda/Acura B18C1 and B18C5 1797cc VTEC engines. This set features a 0.025" (0.025mm) oversize specification for machined crankshafts, making it ideal for performance rebuilds and racing applications.

Advanced Tri-Metal Construction:

• Multi-layered tri-metal copper alloy construction combining high strength with excellent seizure resistance
• High-strength overlay plate with reduced thickness for superior fatigue resistance
• Hardened steel backing on all rod bearings for improved lining support and retention
• Designed to withstand extreme high-RPM conditions and demanding racing environments

Performance Engineering Features:

• Increased crush for enhanced bearing retention and heat dissipation
• Elimination of flash plating on bearing backs to improve heat transfer and maximize housing grip
• Increased eccentricity to compensate for bore distortion at high RPM
• Precision micron-tolerance machining for consistent wall thickness and crush
• Tight wall tolerances to maintain consistent clearances during assembly
• Enlarged inner diameter chamfers to accommodate large fillet radius performance crankshafts

Complete Set: Includes 8 bearing halves for 4 connecting rods, providing everything needed for a complete rod bearing replacement. ACL Race Series bearings are trusted by professional engine builders and racers worldwide, from drift competitions to championship-winning race engines.