S15 Aero Front Bumper

[jsales]

Does anyone know what part number is supposed to be stamped/etched into the optional S15 Aero front bumper?
I know the correct part number is K6020-85F08 but I’ve seen one with
K6020-85FXX, is the “XX” because of the different variations? I’d just like to know if my bumper is genuine or a replica. Thanks