g35 HID retofit posted by SuparexTT on May 28, 2008 at 08:42 PM
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The three you mentioned have a very good history for retrofits and produce very good results.
Either way, the Kaixen kit (as well as any plug and play kit) will be using 300zx projectors which are not made specifically for HID's so the results will be worse than a true retrofit. Whether or not that difference bothers you enough to go through with a full retrofit is up to you.