ACL Bearings 4B1691A-STD Standard Connecting Rod Bearing Set

The ACL Bearings 4B1691A-STD is a standard size connecting rod bearing set engineered for high-performance and racing applications. Part of ACL's renowned Race Series lineup, these bearings feature tri-metal construction with hardened steel backing for superior strength and retention in demanding engine builds.

Key Features:

• Tri-metal bearing construction for excellent seizure resistance and durability
• Hardened steel backing improves bearing support and retention in the housing
• High-strength overlay plate with reduced thickness for improved fatigue properties
• No flash plating on bearing backs to maximize heat transfer and grip
• Increased eccentricity compensates for bore distortion at high RPM
• Tight wall tolerances help maintain consistent bearing clearances
• Manufactured to micron-level tolerances for precise fit

ACL Race Series bearings are designed to withstand higher RPM conditions and are trusted by professional engine builders and racers worldwide. These bearings deliver the quality and performance needed for modified and race engines where standard bearings fall short.