To select the appropriate fitting, use the picture to determine the part that is needed and then select the correct part from the drop down.
OLD/BILLET XONA ROTOR BEARING HOUSINGS USE 14MM COOLANT FITTINGS!
NEW/CAST XONA ROTOR BEARING HOUSINGS USE 10MM COOLANT FITTINGS!
The 10mm is available in -4an and -6an, the 14mm to -4an comes with one fitting and one crush washer. The TiAL barb fittings are also sold individually, one order contains one banjo bolt, one fitting, and two crush washers. TiAL fittings are available in M14 and M18 sizing. All applicable turbos need two fittings per turbo.