ACL Bearings 5M1038H-10 Race Series Main Bearing Set Undersize - 010

The ACL Bearings 5M1038H-10 is a high-performance Race Series main bearing set engineered for Chevrolet 400 Small Block V8 engines with .010" undersize crankshaft journals. These trimetal engine bearings are specifically designed to withstand higher RPM conditions and feature a high-strength overlay plate with reduced thickness for improved fatigue properties.

Key Features:

• ACL Race Series bearings are recognized as a premier brand throughout the motorsports world, used as standard components in race engines that have set records and won championships from sport compact drift racing to NASCAR, IHRA, and NHRA competitions
• Trimetal construction featuring lead, tin, copper, and nickel for superior strength and seizure resistance
• Increased eccentricity improves shape adaptation to compensate for bore distortion at high-speed operation and assists in the formation of hydrodynamic oil film
• H-Series designation indicates standard oil clearance for optimal performance
• Precision specifications include shaft size range of 2.6484" to 2.6493" and tunnel size range of 2.8406" to 2.8415" with maximum wall thickness of 0.0953"

The unique combination of design, metallurgy, and engineering provides Race Series performance bearings with the endurance and capability to perform where others cannot, available for a variety of American, Asian, and European performance engines. These bearings offer better quality with higher bearing capacity than standard bearings, with improvements in material, dynamic thickness, heat conduction, oil grooves, and oil distribution.