The first modification I made to my Street was to replace the standard headlight reflector with the HD Daymaker LED reflector (not the projector type) P/N 67700355. I would not go back to incandescent headlights if I could. I have even upgraded my car-cage to H4 LEDs, which is not even registered![SNIP]
If there's one thing I might go up on is the 5" headlight. On the day I had my seat done, it was early riding in. It was still night at 5 AM. The stock headlight is not impressive.
Nb. Here in Australia, you need to pay a fee to register a vehicle before using it on public roads.
Edit: Double checked part number the HD-67700173 originally quoted is a 7".