ACL Bearings 4B610AO/S2-10 Race Series Conrod Bearing Set 0.010" Oversize

The ACL Bearings 4B610AO/S2-10 is a Race Series connecting rod (conrod) bearing set engineered for four-cylinder engines requiring a 0.010" (0.25mm) oversize grind. Designed for high-performance and motorsport applications, this set delivers the precision tolerances and advanced metallurgy that professional engine builders demand.

ACL Race Series conrod bearings feature an aluminum overlay (AO) tri-metal construction ? a hardened steel backing bonded to a copper-lead intermediate layer and finished with a high-strength aluminum overlay ? providing excellent load capacity, superior oil film retention, and outstanding resistance to fatigue under high-RPM and high-load conditions.

Key Features:

• Tri-Metal Construction: Hardened steel back, copper-lead intermediate layer, and aluminum overlay for maximum strength and durability
• 0.010" Oversize: Engineered for journals that have been machined 0.010" undersize during engine reconditioning
• Tight Wall Tolerances: Precision-manufactured to ensure consistent bearing clearances and reliable oil film formation
• High Crush Design: Improved bearing retention through increased radial contact pressure, also aiding heat dissipation
• Increased Eccentricity: Gradual wall thickness reduction from crown to parting line compensates for bore distortion and promotes hydrodynamic oil film formation
• Oversize Chamfers: Where applicable, for improved fitment on reconditioned journals
• Race-Proven Performance: Trusted by professional engine builders in motorsport and performance street applications worldwide

ACL traces its heritage to 1922 and has grown into one of the world's most respected performance bearing manufacturers. The Race Series line is the preferred choice for builders who demand OEM-plus reliability combined with competition-level performance. This bearing set is sold as a complete set for one engine.