Sometimes needed on GT Series (GT25/28/30) turbos to reduce quantity of oil flowing through turbo.-4 inlet and standard 7/16x24tpi out. Fits some T28s as well if they are NOT M12
Sometimes needed on GT Series (GT25/28/30) turbos to reduce quantity of oil flowing through turbo.-4 inlet and standard 7/16x24tpi out. Fits some T28s as well if they are NOT M12