@gatojurko - Bi-xenon is not what you're describing. Bi-xenon uses a gate in the projector to transition from low-beam to high-beam. RB is not talking about putting an HID in the high beam.

Also, I would highly recommend not using anything over 6000K. The prior owner of my X5 had put 10000K bulbs in and they were worthless. I don't know about where you are, but I think anything over 6000K is illegal in the US, as well as being pointless from a quantity of light perspective. I changed from 10000K crappy purple-colored no light producing bulbs to OEM Osram's and the light difference is incredible.

BTW, I love the color of your X5, and I'm jealous you have a diesel!

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Nathan
01 4.4i Pearl Beige Metallic