For my friend's R34 GT-T, I bought him a D2C kit and it fit fine.
While on the topic.. for those who already have standard xenon bulbs, if we wanted to upgrade, would the standard ballast be up for the job so I just need to purchase the bulbs separately? Or would a replacement kit (bulbs and ballast) be recommended?
I feel that the brightness of my stock xenons are pretty weak (but kelvin rating is fine with me) compared with the aftermarket kit I had in my previous car.