Street Glide rear speakers?

[mopar]

I purchase a toup pack, rear speaker kit (77155-06), and harness (70169-06). If I install it and have the dealers do the download for the radio, Is that All I need to have rear speakers work as factory (fader). I have seen some bikes with a speaker switch on the dash. Do I need one or is it in the radio now?

 

[whatyardwork]

Pretty sure your going to want an amp as well as adding those rears will cut down wattage to the fronts.77167-98 if its not too late Id look at this kit for $70 more.