I've heard of zenkis with different low beam bulbs from the factory. Most zenkis though, have a hi/lo h4 bulb for the low beam. When you turn the high beams on, a separate filament in the h4 bulb turns on alongside the 9005 or whatever the inside high beam bulb is, which is why the connector has 3 prongs. As for the ddm hids, they sell the h4 kit with a hi/lo option which retains this function perfectly.
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