ACL Bearings 4B1925HXD-STD Race Series Rod Bearing Set Extra Clearance

The ACL 4B1925HXD-STD is a complete tri-metal Race Series connecting rod bearing set for Honda and Acura B18C VTEC engines, including 8 bearing halves for 4 rods. The 'X' designation signifies this set provides 0.001" (0.025mm) extra oil clearance on a standard journal, ideal for high performance applications and select fitting to obtain required clearance.

Key Features:

• High-strength overlay plate with reduced thickness for improved fatigue properties
• Hardened steel backs on all rod bearings to improve bearing lining support and assist with bearing retention in the housing
• Elimination of flash plating on the bearing back to improve heat transfer and maximize grip between bearings and housing
• Increased eccentricity to compensate for bore distortion at high RPM and assist in formation of hydrodynamic oil films
• Micron tolerance machining supported by precision measurement systems delivers consistent accuracy to wall thickness and crush
• Enlarged ID chamfers on bearing edges where required to accommodate large fillet radius on performance crankshafts

These high performance tri-metal engine bearings are designed to withstand higher RPM conditions. Improvements in material, dynamic thickness, heat conduction, oil grooves and oil distribution make ACL Race Series bearings an excellent choice for serious engine builders and racing applications.