ACL Bearings 4B8340-1.00 Performance Connecting Rod Bearing Set Oversize - 1.00mm

The ACL Bearings 4B8340-1.00 is a high-performance connecting rod bearing set designed for demanding motorsports and performance applications. This Race Series bearing set features a 1.00mm (0.040") oversize specification for use with reground crankshafts or oversized connecting rod bores, providing proper clearance restoration during engine rebuilds.

Key Features:

• High-strength overlay plate with reduced thickness for improved fatigue resistance and durability
• Hardened steel backing on all bearings for superior bearing retention and structural support
• Increased crush design for improved retention in the housing
• Flash plating eliminated on bearing backs to maximize heat transfer and improve grip
• Tri-metal copper-lead construction for exceptional wear resistance
• Tight wall tolerances for consistent bearing clearances
• Enlarged ID chamfers where applicable to accommodate large fillet radius on performance crankshafts

ACL Race Series bearings feature advanced material engineering, optimized dynamic thickness, enhanced heat conduction, and improved oil distribution, making them ideal for high-RPM racing engines. These bearings are specifically designed to withstand higher RPM conditions and are available for many popular 4, 6, and 8-cylinder applications. The 1.00mm oversize specification allows engine builders to properly restore bearing clearances when machining work has been performed on the crankshaft or connecting rods.