ACL Race main bearings for Mitsubishi 4B11

ACL Race Series main bearings for Mitsubishi 4B11 are trimetal engine bearings designed for higher RPM conditions. Their construction combines high strength, precise engineering and improved fatigue properties.

The main bearing set features 3/4 grooves to optimize the bearing load-carrying surface area and oil flow to the conrod bearings. Increased eccentricity assists with hydrodynamic oil film formation, while tight wall tolerances help maintain consistent clearances.

• High-strength overlay plate with reduced thickness
• Increased crush for improved bearing retention in the housing
• Elimination of flash plating on the back for improved heat transfer
• 3/4 grooves for optimized oil flow and load-carrying surface area
• Enlarged ID chamfers for large fillet radii on performance crankshafts

Suitable for: Mitsubishi Lancer VIII (CY/A).

Engines: 4B11 (4B11-T). Please check your vehicle’s engine code (registration document or VIN) before ordering; if in doubt, contact us and we will check for you.

Sizes

STD is the standard size for an unground crankshaft. Undersizes (−0.25 mm, −0.50 mm …) are for a reground crank, and “+0.025 mm clearance” (X) is for highly stressed engines. Your machine shop chooses the size after measuring.