ACL Bearings 4B1972HD-STD Race Series Rod Bearing Set for Honda K20A2 K24A

The ACL Bearings 4B1972HD-STD is a high-performance Race Series connecting rod bearing set designed for Honda and Acura 2.0L and 2.4L K-series engines, including K20A2, K20Z1, K24A, and K24Z1 applications. This standard size bearing set is engineered for motorsports applications and high-RPM operation where durability and precision are critical.

Race Series Performance Features:

• High-strength overlay plate with reduced thickness for improved fatigue properties and longer service life
• Hardened steel backing on all rod bearings to improve bearing lining support and assist with retention in the housing
• Elimination of flash plating on bearing backs to improve heat transfer and maximize grip between bearing and housing
• Increased eccentricity to compensate for bore distortion at high RPM and assist in hydrodynamic oil film formation
• Tight consistent wall tolerances manufactured to micron-level precision to help maintain consistent clearances
• Trimetal construction providing high strength and excellent seizure resistance

ACL Race Series bearings are recognized throughout the motorsports world and are standard components in race engines competing from drift racing to NASCAR, IHRA, and NHRA competitions. These bearings are manufactured to exacting tolerances with precision measurement systems ensuring reliable fit and consistent performance in demanding applications.