I'm assuming you have after market headlight housings that use an H7 bulb instead of the H13 that fits the stock housing. You can get decoders for any led bulbs, but most newer leds today are CANBUS ready, which means you won't get the "light out" on your dash when in fact, you don't have a light out. This can be corrected with resistors, which is what I did. The resistors also prevent flashing headlights and intermittent outages, which can really freak the missus out on a dark night going down an unlit road. (6 ohm-50W are standard for most 12v CANBUS systems) The type of led you decide to go with will have a big impact on your final light. I tried 3 sided first (what a joke) and then 2 sided (awesome light) then upgraded the foglights too. Really awesome! Hope this helps,