Will stock oem audi 4300k H7 hid bulbs fit into my aftermarket hid unit
#2
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So if all you are doing is changing the bulb, but keeping them the same exact bulb type (H7) then you should have no problem with the switch.
#4
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still use the H7 bulbs, you would just need to get the adapter for the H7 bulb that turns the base into a D2S base. A couple threads up talk about the adapter a little.
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