ACL Bearings 4B1972HD-.25 High Performance Rod Bearing - Set

The ACL Bearings 4B1972HD-.25 is a high-performance connecting rod bearing set engineered for demanding automotive applications. This HD (Heavy Duty) series bearing features a 0.25mm undersize specification, designed for use with reground crankshafts or performance engine builds requiring precise clearance control.

Key Features:

• Heavy Duty (HD) construction for increased load capacity and durability
• 0.25mm undersize for use with machined or reground crankshafts
• Tri-metal construction with performance bearing material
• Precision-engineered tolerances for optimal oil clearance
• Enhanced fatigue resistance for high-performance and racing applications
• Compatible with both stock and performance engine builds

ACL Race Series bearings are manufactured using advanced metallurgy and strict quality control processes to ensure consistent performance under extreme conditions. The undersize design allows engine builders to restore proper bearing clearances when machining crankshafts, making them ideal for rebuilds and performance upgrades.