Originally Posted by mrkyle3
H9 to H11 conversion. That's the way to go.
Not on an '05 it isn't, especially one with HID's. Only the '08-up has H11 low beams.
TRMN8R, why would you put aftermarket lights in your STi when it already has the factory HID's? Unless you do a projector retrofit nothing on the aftermarket is likely to give you better lighting.
If you're thinking of changing the HID bulbs only, don't. There is nothing to be gained, and plenty to be lost, by replacing the OEM 4300K D2R bulbs with anything else.