I think it'll work but the 04/05 ballast won't screw into the 06 headlight like it's supposed to. You'll probably have to use some zip ties or tape to secure it.
I actually bought the Depo Euro R headlights so that works in my favour! I emailed Heeltoe to ask them so hopefully they can confirm as well.I think it'll work but the 04/05 ballast won't screw into the 06 headlight like it's supposed to. You'll probably have to use some zip ties or tape to secure it.