OEM: Osram 66440CLC D4S is a budget-yet-OEM replacement for the Osram 66040 or 66440, which are original equipment on many modern Japanese and German cars today. Priced Right: These are what the amazing 66440 CBI bulbs are based off of, have nearly the same specifications and cost nearly 50% of their price. Compare to dealership list price @ $194/bulb. No matter the preference, we have your Osram HID replacement bulbs! Genuine: our shop is proud to offer high quality Original-Equipment Osram bulbs. We pride ourselves on being one of the last few distributors shipping genuine Philips & Osram lamps in the US. It is estimated that 80% of these bulbs sold through outlets such as eBay or Amazon are fakes.