ACL Bearings 5M1633HX-STD Race Series Main Bearing Set with Extra Clearance

The ACL Bearings 5M1633HX-STD Race Series main bearing set is engineered for high-performance and racing applications where engines operate at higher RPM levels and under more demanding conditions than factory specifications. This standard size bearing set features ACL's advanced F780 tri-metal material construction with upper and lower bearing halves.

HX Extra Clearance Design:

The 'HX' designation indicates these bearings provide an additional 0.001 inch (0.025mm) of oil clearance compared to standard H-series bearings, making them ideal for high-performance applications where increased oil flow is beneficial. This extra clearance is a popular preference for performance engine builds.

Key Features:

• Tri-metal construction with lead, tin, copper and nickel for superior strength and seizure resistance
• High strength overlay plate with reduced thickness for improved fatigue properties
• Hardened steel backs to improve bearing lining support and assist with bearing retention
• Elimination of flash plating on bearing backs to improve heat transfer and maximize grip
• Increased eccentricity to compensate for bore distortion at high RPM and assist in hydrodynamic oil film formation
• Enhanced material properties, dynamic thickness, heat conduction, and optimized oil groove design

Application:

This bearing set is designed for Nissan CA16, CA16DE, CA18, CA18DE, CA18DET, CA18ET, CA20E, CA20P, CA20S, CD17, and CD20 engines. Technical specifications include a maximum shaft diameter of 52.964mm and maximum tunnel size of 56.667mm.

ACL Race Series bearings are recognized as a premier brand throughout the motorsports world, used in race engines that have set records and won championships from drift racing to NASCAR competitions. Always consult with a professional engine builder to determine the correct bearing clearances for your specific application.