Hi mate,
Xenons and HID (High Intensity Discharge) are one and the same and very expensive for good quality versions. To have aftermarket HID's you will need auto levelling and headlight washers to comply with the ADR's. Much cheaper and easier option would be to get a set of aftermarket projector lights with white incandescent bulbs, much cheaper and easier to install and looks almost identical. Check out ecstuning.com and tmtuning.com for some options on different styles.
Hope this helps.
jared
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