ACL Bearings 4B1780-.25 High Performance Connecting Rod Bearing Set 0.25mm Oversized

ACL Performance Race Bearings are manufactured with a tri-layer metal with a hardened steel backing designed to withstand high RPM conditions, high stress loads, and elevated temperatures. This 4B1780-.25 connecting rod bearing set features 0.25mm oversized dimensions to accommodate engine rebuilds where crankshaft journals have been machined for restoration.

Key Features:

• Trimetal design with high-strength overlay plate and reduced thickness for improved fatigue resistance
• Large chamfer to accommodate larger crankshaft fillets
• 3μ474 groove to provide optimum oil supply to rods and maximize load carrying capacity
• Increased crush and tighter wall tolerance for better seating
• No flash plating applied to improve bearing retention and maximize heat transfer
• Manufactured to exacting tolerances with micron tolerance machining for consistent accuracy in wall thickness and crush

ACL Race Series bearings deliver the precision engineering and metallurgy needed for demanding performance applications, from high-output street builds to professional racing engines. These bearings provide superior protection against wear and fatigue while maintaining optimal clearances under extreme operating conditions.