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Care to explain yourself?
Look at your stock 9004 lamp , the hi and low filaments are at different heights , which causes the pattern to change. Why wouldn't moving the HID lamp accomplish the same same pattern change.
They don't have a mask like an H4, they use the whole reflector on both high and low.
Jury is out as I have not received them
HIDExtra.com
They use an extending H4 with a mask
or a tilting 9004 for ours which, as I see it is the correct method to get High and Low out of a headlamp equipped with a 9004 bulb.
