ATP Fitting, Subaru STI Oil feed source, 12MM Female Flare to 4AN Male - ATP-FTG-030Custom metric fitting to use Subaru STI stock oil feed source. 12mm female flare to 4AN male. Allows 4 steel braided line to screw into. Application Notes: This fitting allow you to unscrew the top half of the factory stock (hard) oil feed line and screw this fitting into the remaining lower part so that it becomes a common 4 AN male (to accept a typical 4 AN size steel braided oil feed line). Only on the STI engine and not WRX.