OEM Bi-xenon... uses a solenoid attached to the shield inside the projector, this shield flips out of the way when the solenoid is active, allowing light to escape from the bottom of the projector... Thus creating a high-beam.


plug-n-play bi-xenon is either:

A: A bulb with a solenoid or a motor that moves the bulb forward and backward to move the arc from under the casper shield to under nothing... this solenoid/motor, as i've read, is shit.. and dies really fast.

OR

B: A bulb with two arcs... this bulb requires 2 ballasts.

The single stage is definately bright enough you really dont need the bi-xenon IMO.