yes, you can also cut off the h13 connector and wire in the H4 - be sure to use soldered connections with heat shrink over them or some other very solid connection to make the splice. If you are adding LED's though, you might need to add anti-flicker capacitor/diode filters which you can buy readily enough - and most of those have the h13 to h4 adapter as part of their harness. There is a ton of info about installing LEDs here and elsewhere - look on youtube! I am doing the same thing this weekend.