EDIT- these look identical to the one's I bought. No guarantee of that though as they're from China...
So this replaces both high and low beam? In just 1 bulb?
Can't say for the Chinese one- it just looks like the one's I bought
Just like the original H4 halogen with twin filaments, the one I have replicates that. Uses same hole and clip in back of reflector and plugs in to original loom H4 3 pin bulb plug, feeding the LED bulb via a black box.