This ACL High Performance main bearing set is machined 0.25mm oversize, for a Subaru EJ20/EJ22/EJ25 crankshaft main journal that has been reground 0.25mm over standard, with the thrust surface located at the #5 main bearing position. Per ACL's own fitment data it's used in the Subaru Impreza (including WRX), Legacy, Outback, and Forester, as well as the Saab 9-2X.
Specifications:
- Type: Main Bearing Set
- Series: High Performance
- Size: 0.25mm Oversize
- Thrust Position: #5
- Engine Fitment: Subaru EJ20/EJ22/EJ25
- Part Number: 5M8309H-.25
FAQ
What does "For Thrust in #5 Position" mean?
Subaru EJ-series blocks were built with the thrust bearing surface at different main positions depending on the engine/model year. This set has the thrust flange at the #5 main position — confirm which position your block uses before ordering.
What does "0.25mm Oversized" mean?
It means the bearing is machined 0.25mm over standard thickness, for use with a crankshaft main journal that has been reground 0.25mm undersize.
What vehicles does this main bearing set fit?
It's sized for the Subaru EJ20/EJ22/EJ25 engine family, used in the Impreza (including WRX), Legacy, Outback, and Forester, as well as the Saab 9-2X.
Do I need rod bearings too?
Yes, this listing is for main bearings only. Rod bearings for the EJ20/EJ22/EJ25 are sold separately.
