I'm a subaru master technician, these case halves have been hot tanked, blasted and honed.

This is a high-quality engine case half assembly for the 2004-2020 Subaru STI EJ257 or EJ255. It is an OEM part and us ready to install. Call/text 5one6-45one-4806 for more information.  Thanks. 516-451-4806