ACL Bearings 5M1172H-STD Race Series Main Bearing Set Standard Size

The ACL Bearings 5M1172H-STD Race Series main bearing set delivers proven performance for Nissan L-series and Z-series inline-4 engines. Engineered for high-performance and racing applications, this standard size bearing set combines advanced metallurgy with precision manufacturing to provide exceptional durability under extreme conditions.

Advanced Tri-Metal Construction:

• Multi-layered tri-metal copper alloy construction provides high strength and excellent seizure resistance
• Manufactured to exact tolerances ensuring reliable fit and consistent clearances
• Hardened steel backs on all bearings for maximum structural integrity

Performance Features:

• Extended 3/4 oil grooves for optimum oil supply and distribution
• Increased crush for secure bearing retention and elimination of flash plating
• Bearing eccentricity and enlarged I.D. chamfers for enhanced performance
• Reduced thickness overlay plate for improved heat dissipation
• Consistent wall tolerances for reliable operation at high RPM

Specifications:

• Bearing width: 1.258 inches
• Outside diameter: 2.3089-2.3094 inches
• Shaft diameter range: 2.1631-2.1636 inches
• Maximum wall thickness: 0.0721 inches
• Set includes 5 bearings
• Standard size (STD)

ACL Race Series bearings are trusted by professional engine builders and racers worldwide for their superior quality control, advanced materials, and proven track record in demanding motorsport applications.