ACL Bearings 7M1164-020 Race Series Main Bearing Set Undersize - 0.020

The ACL Bearings 7M1164-020 is a precision-engineered main bearing set designed for performance engine builds and rebuilds. This 0.020" undersize bearing set is manufactured in Tasmania, Australia, using advanced tri-metal construction to deliver superior durability and load capacity in demanding applications.

Key Features:

• Tri-metal construction with high-strength overlay for improved fatigue resistance
• 0.020" undersize dimension for reground crankshafts
• Hardened steel backing for enhanced support and bearing retention
• Elimination of flash plating on bearing backs for improved heat transfer
• Increased eccentricity to compensate for bore distortion at high RPM
• 3/4 groove design to optimize load-carrying surface area and oil flow
• Tight wall tolerances for consistent bearing clearances
• Enlarged ID chamfers to accommodate performance crankshaft fillet radii

ACL Bearings has over 70 years of experience manufacturing precision engine bearings and maintains a global reputation for quality metallurgy and performance. Each bearing set is engineered to withstand higher RPM conditions while providing improved heat dissipation and oil film formation compared to standard replacement bearings.