Because of the way the original halogen bulb clips into the housing, an HID bulb won’t be a direct swap without these adapters.
Check your headlights for a similar looking plastic part socket behind the bulb to identify whether or not you need these. All housings would take H7 bulbs and use projectors.
Slotted design allows the wiring for the bulb to slide in from the side, and then original clip assembly will hold bulb firmly in place just like stock.
Unfortunately, Morimoto’s larger base design does not allow them to work with these adapters without modification. If you’re doing an HID upgrade on a euro that requires these adapters, we urge you to pick up a different set of H7 HID bulbs that are hard-wired to make your life a little easier.
We have been doing this for more than a decade. If you are still unsure of what to do, where to go, or just plain have questions, don’t be shy. We are always here to help you in every way that we can and will continue to keep helping out until you fully understand the entire process from start to finish. Remember, we are people too, and everyone starts off the same way with knowing nothing so we completely understand if this is overwhelming for you as we were in the same boat. So contact us and we will get you started towards the right path.