ACL Bearings 5M1957HX-STD Race Series Main Bearing Set for Honda

ACL Race Series main bearings are designed for tuning and engine upgrades, offering superior quality with higher bearing capacity than standard bearings. These performance main bearings are manufactured with tri-layer metal construction to withstand high RPM conditions, high stress loads, and high temperatures.

Key Features:

• High strength overlay plate with reduced thickness for improved fatigue properties
• Hardened steel backing to improve support of the bearing lining and assist with bearing retention
• Increased crush for improved bearing retention in the housing
• 3/4 groove design to optimize bearing load carrying capacity and oil flow to rod bearings
• Large chamfer to accommodate larger crankshaft fillets
• Flash plating eliminated on bearing backs to improve heat transfer and maximize grip
• Increased eccentricity to compensate for bore distortion at high RPM
• Micron tolerance machining for consistent accuracy in wall thickness and crush

This is a standard size (STD) bearing set with identical halves, manufactured with F780 bearing material. The HX suffix denotes Race Series with 0.001" extra clearance for high performance applications. ACL Race Series bearings are proven components in race engines that have set records and won championships across multiple motorsports disciplines.