ACL Bearings 4M8063A-STD Race Series Connecting Rod Bearing Set Standard Size

The ACL Bearings 4M8063A-STD is a high-performance connecting rod bearing set engineered for Mitsubishi 4-cylinder engines. These Race Series bearings utilize advanced trimetal construction combining superior design, metallurgy, and engineering to deliver exceptional durability in demanding motorsports applications.

Key Features:

• Standard size (STD) connecting rod bearing set for precise OEM replacement dimensions
• Trimetal bearing construction with high-strength overlay plate for improved fatigue resistance
• Hardened steel backing on all rod bearings to improve support and bearing retention
• Designed to withstand higher RPM conditions in performance and racing applications
• Reduced overlay thickness for enhanced fatigue properties
• Elimination of flash plating on bearing backs to improve heat transfer and housing grip
• Increased eccentricity to compensate for bore distortion at high RPM
• Tight, consistent wall tolerances for maintaining proper clearances
• Enlarged ID chamfers on bearing edges to accommodate performance crankshaft fillets

ACL Race Series bearings are proven in championship-winning engines across NASCAR, NHRA, IHRA, and sport compact racing. Whether you're building a high-performance street engine or a dedicated race motor, ACL bearings provide the reliability and endurance required for demanding applications.