I suppose those who have gone to the expense to purchase Euro headlights already notice this, but I just figured out that the 9003 bulb is basically identitcal to the H4, at least in 60/55w. Just a tip, in case you're broke after buying the headlights (or stuck in B.F.E. with a dead bulb!) and need to light them up. Many stores won't even have H4 bulbs, but have 9003's on the shelf.