ACL Bearings 5M8309HC-.25 Race Series Coated Main Bearing Set for Subaru EJ20, EJ22 and EJ25

Upgrade the engine’s bottom end with the ACL Bearings 5M8309HC-.25 Race Series Main Bearing Set, engineered for Subaru EJ20, EJ22 and EJ25 applications. These coated main bearings feature a 0.25 mm undersize configuration for crankshafts machined to the specified journal size, making them a practical choice for performance rebuilds, upgraded street engines and demanding motorsport applications. Verify crankshaft measurements and application compatibility before installation.
The Race Series design is developed to provide dependable support for high-performance Subaru engines. A specialized coating helps promote wear resistance and consistent bearing operation, while the precision-manufactured construction supports proper oil control and crankshaft alignment when used with correctly prepared components. This kit is intended for professional-quality engine assembly and should be installed according to the engine builder’s clearances and manufacturer recommendations.
Designed as a matched main bearing set, the ACL Bearings 5M8309HC-.25 helps simplify component selection during an EJ-series rebuild. The 0.25 mm undersize specification should only be used with a crankshaft that has been properly inspected and machined as required. Always clean the block and crankshaft thoroughly, confirm bearing oil-hole alignment, and measure final clearances with appropriate precision tools before completing assembly. This product is not air restricted and does not require truck freight.

Features:

• Brand: ACL Bearings

• Part Number: 5M8309HC-.25

• Series: Race Series

• Bearing Type: Main bearing set

• Fitment: Subaru EJ20, EJ22 and EJ25 engines

• Bearing Size: 0.25 mm undersize

• Construction: Coated bearing design

• Application: Performance engine rebuilds and high-demand street or racing use

• Shipping Classification: Not air restricted and not truck freight only