I swear I have looked , and looked again , trying to find a straight up answer to my question, but unfortunately I have not been able to find anything. 2003 Blackbird, and looking to buy spare light bulbs just in case the ones I have on burn up. Somebody please send me a short reply and advise me on the purchase. What is the exact part number for the Silverstar bulb for both, low and high beam ? is it a H7 or an H4? Is it a single filament or dual filament? Is it a three connector base or a two connector base. Any input is greatly appreciated as I am extremely confused right now!

If possible, I'd get Philips Vision bulbs.

I don't have my Bird at this house right now, so all I remember to tell you is that it's single filament.

Also, why haven't you gone to HID?

H7

+1 on the H7

But with prices on HID slimlines as low as they are, you should consider doing the upgrade. I have the old larger balast and carry the origional bulb under the seat.
I could change it out on the road in less than 30 minutes if I ever had to.

Philip has run HID for a few years and lots of miles.
Once you put one in, you will wonder why you waited.