Some stock bulbs uses spacers/adapters. When converting to HID's, the stock adapter will not work, so you will need this spacer.
This is common on Suzuki Motorcycles, some Honda Motorcycles, and some Acura cars. Check your application to see if its required. If you're not sure, just ask us. For installation on how to install this spacer on our HID bulbs, please look at the pictures.
