Quote Originally Posted by fmzip View Post
I would definitely remove the stock sub completely and use that as a port to get more bass in the cabin.....Need some details on retrofitting an electric sunshade, link??!!
Can’t really provide a link yet as I’ve not put it in a thread. It’s one of many many retrofit mods I’m doing at the same time. When they are all finished it will go in one thread showing everything.

Either way, don’t think it’s an option on the S4.