ACL Bearings 5M2964H-STD Race Series Main Bearing Set for Nissan - SR20

The ACL Race Series Main Bearing Set is engineered for high-performance Nissan SR20DE and SR20DET engine builds where reliability under extreme conditions is critical. The unique combination of design, metallurgy and engineering put into ACL Race Bearings comes together to deliver what drivers expect from high performance Trimetal engine bearings.

Key Features:

• Tri-layer metal construction manufactured to withstand high RPM conditions, high stress loads, and high temperatures
• Micron tolerance machining supported by precision measurement systems delivers consistent accuracy to key characteristics like wall thickness and crush
• F780 bearing material for enhanced durability and heat dissipation
• Standard size (STD) for factory crankshaft dimensions
• Includes upper and lower bearing halves for complete main journal coverage
• Improvements of material, dynamic thickness, heat conduction, oil grooves and oil distribution

Technical Specifications:

• Part Number: 5M2964H-STD
• Bearing Size: Standard (STD)
• Bearing Material: F780 Trimetal
• Maximum Shaft Size: 2.1646 inches (54.98mm)
• Minimum Shaft Size: 2.1636 inches (54.956mm)
• Maximum Housing Bore: 2.3216 inches (58.968mm)
• Vertical Oil Clearance Range: 0.0017" - 0.0037" (0.042mm - 0.095mm)
• Wall Thickness at Crown: 0.0778 inches (1.975mm)
• Overall Length: 0.752 inches (19.1mm)

This Race Series main bearing set is specifically designed for Nissan SR20DE and SR20DET engines found in 240SX, Silvia S13/S14/S15, 200SX, and Bluebird models. The H-suffix denotes ACL's Race Series designation, indicating these bearings are built for motorsport and high-performance street applications. This ensures reliable fit and helps maintain consistent clearances throughout your engine's operating range.