i just checked w/ my guy and they dont make dual beam in 9006. U'll have to get a set of 9006 and 9005. So it'll be 2 different HID kits.
U can still get a dual beam but 9004, u'll have to custom fit it in and its really hard to keep it straight so unless u know what ur doing, it wont be worth it.
I'd say get the 9006 HID kit and just get regular HID bulbs for 9005. U'll like it that way.