ACL Bearings 1B8401-STD Standard Size Connecting Rod Bearing Set

The ACL Bearings 1B8401-STD is a standard-size connecting rod bearing set (conrod bearing / big-end bearing) engineered to deliver precision fit and reliable performance in the connecting rod housing. ACL Bearing Company is recognized as one of the world's leading manufacturers of precision engine bearings, with a heritage in motorsport and original equipment manufacturing spanning decades.

These conrod bearings are constructed using ACL's tri-metal copper-lead bearing material, offering superior load capacity, heat dissipation, and wear resistance compared to standard OEM-replacement bearings. The tight wall tolerances ensure consistent oil clearances critical to proper engine operation and longevity.

Key Features:

• Standard size (STD) — direct replacement for engines with standard-size connecting rod journals
• Tri-metal construction — copper-lead alloy bearing material for high load capacity and durability
• Tight wall tolerances — ensures consistent and accurate oil clearance during assembly
• Hardened steel backs — improves support of the bearing lining and aids retention in the rod housing
• No flash plating on backs — improves heat transfer through the bearing shell and maximizes grip between bearing and housing
• Enlarged oil feed holes — promotes optimal lubrication to the big-end journal
• Genuine ACL product — manufactured to precise OEM-level quality standards

The 1B8401-STD is sold as a complete conrod bearing set. Always verify oil clearances with precision measuring equipment during installation. Undersized variants may be available for engines with reground crankshafts — consult your ACL distributor before machining.