This item contains one pair (2 pieces) of D2S HID Bulb Conversion Adapters to install the aftermarket HID Conversion Kit.
These D2S Adapters Will allow you to place any aftermarket D2S HID bulb firmly, quickly on the original headlamp housing without modification or destroying the original socket.
If you are not sure whether this Adapter is compatible with your vehicle, just pop up the hood and compare it with the stock headlamp socket.
Easy to install.
Commonly used by BMW E46 3 Series 1999-2005.