ACL Bearings 5M8309H-STD H-Series Main Bearing Set for Subaru EJ-Series

Upgrade the engine’s internal bearing support with the ACL Bearings 5M8309H-STD H-Series Main Bearing Set. Designed for Subaru EJ-Series engines, this standard-size main bearing kit provides a dependable fit for rebuilds, performance applications, and replacement projects where accurate crankshaft support is essential. The H-Series design is engineered for demanding engine environments and helps promote consistent lubrication and reliable operation under increased load.
The ACL Bearings 5M8309H-STD main bearing set is manufactured for use with standard-size crankshaft journals. Each bearing is designed to support proper clearance, oil control, and crankshaft stability when installed with correctly prepared engine components. This kit is a practical choice for professional engine builders and enthusiasts seeking trusted aftermarket bearing technology from ACL Bearings.
For best results, verify crankshaft condition, housing alignment, bearing clearances, and engine compatibility before installation. Follow the engine manufacturer’s service procedures and use appropriate assembly lubricant and torque specifications. The standard-size configuration should only be used when crankshaft and block measurements confirm that standard bearings are required. This main bearing set is supplied as a kit for Subaru EJ-Series applications and is not intended to replace the need for precise machine-shop inspection during an engine rebuild.

Features:

• Brand: ACL Bearings

• Part Number: 5M8309H-STD

• Bearing Type: H-Series main bearing set

• Application: Subaru EJ-Series engines

• Bearing Size: Standard-size configuration

• Designed for reliable crankshaft support and consistent oil control

• Suitable for engine rebuilds, replacement applications, and performance projects

• Air Restricted: No

• Truck Freight Only: No