What is the best upgrade that retains the black color and can be installed with no modifications? "Plug and play" installation so to say.

Who has upgraded? Any pictures?

IMHO the horn is too quiet/ soft .. it is not a commanding note. I think ball bearings or a middle finger salute would work better than this horn

 

What I did was to go to Auto Zone and bought the black plastic high pitch horn,for about 12.00,sounds about like the horn on my Electra,only thing is to kind of bend the mouting bracket back towards the engine,so that the feder will not contact the horn.

 

I did a big twin horn conversion on my 07 883C. You would have to find a black horn cover rather than the crome one the kit comes with.

 

The finger works just fine for me.

 

I mounted a replacement car horn from JCW on mine. great at low speeds, but suffers a bit at high speeds because it points forward and scoops air. It is black, but I had to make a replacement mounting bracket. Don't know (offhand) where the horn mounts on a Nightster, but it shouldn't be too difficult to mount and the horn is inexpensive. I'm going to try a boat horn next. ;-)