hi,

I want to change the bulbs of my prodrive headlights.
But don't know where to find the numbers.
the factory wrx headlights use 12V, 55/60W H4 bulibs. Could this be the same with prodrive's?

I don't have prodrive headlights so I can't answer but usually there are little words on the headlight lense saying which bulb is to be used, along with manufacture logo and DOT stamp.
See if there is any words stamped on the lense.

Prodrive uses H7;s for the low and high beam. Not sure what the stock wattage is though...