Update. I updated the maps and software on the Garmin and put it back on, noise gone. I then figured out the streaming music over the Bluetooth receiver was tinny and somewhat muted when the gps was on. I installed the MPOW filter in different places of the splitter, once I put it between the gps and splitter everything worked great.
The final configuration is Garmin 550 with Mpow filter, Edsets splitter cable, cheap Bluetooth receiver that hard wired in to power so it shuts down on key off(ebay), and a 3.5mm splitter. I now have gps, cell phone calls, and streaming pandora all through my helmets on the aux setting. IMC wired headsets.