ACL Bearings 4B1946HX-STD Race Series Tri-Metal Connecting Rod Bearing Set

ACL Race Series connecting rod bearings are high-performance tri-metal engine bearings designed to withstand higher RPM conditions for Honda and Acura B-series and related engines. Compatible with B16A, B17A1, B18A, B18A1, B18B1, B18B2, B20A (SOHC), B20B, B20Z, F18B, and F20B engines, these bearings deliver motorsports-proven performance and durability.

Key Features:

• Tri-metal construction with steel backing, copper/lead/tin intermediate layer, and lead/tin/copper overlay
• High-strength overlay plate with reduced thickness for improved fatigue properties
• Hardened steel backs on all rod bearings to improve lining support and bearing retention
• Features .001 inch (.025mm) extra oil clearance for high-performance applications
• Manufactured to exacting tolerances with particular attention to wall thickness accuracy for consistent clearances
• Increased crush for improved bearing retention and better heat transfer
• Chamfered bearing edges for compatibility with performance crankshafts

Specifications:

• Size: Standard with .001" extra clearance
• Minimum shaft size: 1.7709 inches, Maximum shaft size: 1.7717 inches
• Minimum tunnel size: 1.8898 inches, Maximum tunnel size: 1.8907 inches
• Maximum wall thickness: 0.0587 inches
• Maximum overall length: 0.7677 inches
• Quantity: 8 pieces (4 bearing sets with identical halves)

ACL Race Series performance engine bearings are recognized as a premier brand throughout the motorsports world, used in race engines that have set records and won championships from sport compact drift racing to NASCAR, IHRA, and NHRA competitions. These bearings provide the endurance and capability required for extreme high-RPM and high-boost applications where standard bearings cannot perform.