ACL Bearings 1B743HD-STD Race Series Rod Bearing Set - Big Block Chevy

The ACL Bearings 1B743HD-STD is a high-performance Race Series connecting rod bearing set engineered for big block Chevrolet V8 engines including 396, 402, 427, and 454 cubic inch applications. This standard size bearing features ACL's advanced doweled design for enhanced durability in extreme performance conditions.

Race Series Performance Features:

• High-strength overlay plate with reduced thickness for improved fatigue resistance
• Hardened steel backs on all rod bearings to improve bearing lining support and retention
• Doweled construction (HD designation) for maximum bearing stability in high-stress applications
• Increased crush design for superior bearing retention in the housing
• Elimination of flash plating on bearing backs to improve heat transfer and maximize grip
• Increased eccentricity to compensate for bore distortion at high RPM
• Tight wall tolerances for consistent oil clearances
• Tri-metal construction combining high strength with excellent wear characteristics

Application: Designed for big block Chevrolet Mark IV engines (396, 402, 427, 454 ci). Standard journal size. Ideal for high-performance street, racing, and marine applications where reliability under extreme conditions is critical.

ACL Race Series bearings are the choice of professional engine builders and racers worldwide, delivering the endurance and performance capability required in high-RPM, high-boost, and extreme-duty applications where standard bearings cannot survive.