ACL Bearings 4B1912HD-.25 Race Series Rod Bearing Set 0.25mm Undersize Honda F20C F22C H22A

The ACL Bearings 4B1912HD-.25 is a high-performance Race Series connecting rod bearing set designed for Honda F20C, F22C, and H22A engines. This 0.25mm undersize bearing set is engineered for engines with reground crankshafts, providing proper clearances for performance applications including high-RPM racing, forced induction, and extreme endurance conditions.

Key Features:

• Tri-metal construction with hardened steel backing, copper intermediate layer, and lead-tin overlay for superior strength and seizure resistance
• Hardened steel backs improve bearing lining support and retention under high loads
• Micron-tolerance machining ensures consistent wall thickness and crush for reliable fitment
• Elimination of flash plating on bearing backs maximizes heat transfer and bearing grip
• Reduced friction design lowers operating temperatures while providing superior lubrication
• Complete set includes 8 bearing halves for 4 connecting rods
• Manufactured to exacting tolerances for consistent oil clearances during assembly

ACL Race Series bearings are the preferred choice of professional engine builders and racers worldwide. Engineered to handle extreme RPM, temperatures, and loads, these bearings deliver exceptional durability and reliability in the most demanding motorsport applications. Compatible with Honda S2000 (F20C, F22C) and Prelude (H22A1, H22A2, H22A4, H22A5, H22A7, H22A8, H22Z1) engines.