ACL Bearings 4B1776-STD Performance Connecting Rod Bearing Set

The ACL Bearings 4B1776-STD is a high-performance connecting rod bearing set engineered for demanding automotive applications. Part of ACL's renowned Race Series lineup, these bearings combine advanced metallurgy with precision engineering to deliver exceptional durability and reliability under extreme operating conditions.

Advanced Trimetal Construction:

These bearings feature a sophisticated trimetal design with a high-strength overlay plate that has been optimized with reduced thickness for superior fatigue resistance. The hardened steel backing provides enhanced structural support and improves bearing retention within the connecting rod housing, ensuring stability even under high loads and elevated RPM conditions.

Race-Proven Engineering Features:

• Hardened steel backs improve bearing lining support and retention in housing
• Increased crush factor enhances bearing retention and stability during operation
• Elimination of flash plating on bearing backs improves heat transfer and maximizes grip between bearing and housing
• Increased eccentricity compensates for bore distortion at high RPM and assists in hydrodynamic oil film formation
• Tight, consistent wall tolerances help maintain precise clearances throughout the bearing
• Enlarged ID chamfers on bearing edges accommodate large fillet radii found on performance crankshafts

Standard Size Specifications:

This bearing set is designed for standard-size crankshaft journals and provides standard oil clearance. The STD designation indicates these bearings are sized for unmodified journal dimensions, making them ideal for stock rebuilds or performance builds using standard crankshaft specifications.

ACL Race Series bearings are trusted by engine builders worldwide and have proven themselves in countless racing applications, from sport compact drift racing to professional motorsports competitions. Whether you're building a high-revving street engine or a dedicated race motor, these bearings deliver the endurance and performance required when reliability is non-negotiable.