ACL Race Series main bearings for Subaru FA20 engines are high-performance main bearing sets offered in specific oversizes and clearances for engine builds. These bearings provide the precise running clearances needed in rebuilt or high-output FA20 applications, and ACL's Race Series naming indicates attention to tight tolerances and durability for demanding use without claiming unlisted material or warranty specifics.
ACL Subaru FA20 0.025mm Oversized High Performance Main Bearing Set