• High performance main bearing set, 0.005mm oversized, #5 thrust position
• Precision-engineered for consistent oil film and clearance
• Designed for EJ20/EJ22/EJ25 applications
• Direct replacement for factory main bearings

Precision Oversizing for a Reconditioned Crankshaft

ACL's high performance main bearing set is sized at 0.005mm oversized specifically for applications where the crankshaft journals have been machined slightly oversize, whether from a crank regrind or to correct wear. Main bearings need to match crank journal dimensions precisely, since too much clearance leads to low oil pressure and knocking, while too little leads to bearing scoring and premature failure. Getting this oversizing correct is exactly why a specialty bearing manufacturer like ACL matters here rather than assuming a standard-size bearing will work. It's a straightforward improvement that's easy to appreciate once it's installed.

The Correct Thrust Position for This Platform

This set includes the correct thrust bearing at the #5 position, matching where Subaru's EJ20/22/25 platform actually places its thrust bearing surface. Getting the thrust position wrong would mean improper crankshaft end-play control, a mistake that's easy to make when sourcing a generic bearing set not specifically designed for this engine family. It's a precision, application-specific bearing set rather than a one-size-fits-all part. That combination of durability and performance is what makes it worth the upgrade.

Straight From Subispeed

A precisely oversized main bearing set for 1998-2004 Forester / 2002-2005 WRX / 1991-2000 Legacy / 2000 Outback — confirm your actual crank journal size matches this 0.005mm oversized spec before ordering.

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