Just got my 08 Ultra and looking to get a bit more tone from the exhaust. I've read several post's in other forums that say you can replace the mufflers without changing the breather and new download. (I'm just a cruising grandpa and not looking to outrun the kids!) Some have stated that the new system will "learn" the new freeflow mufflers and adjust itself. Any info and muffler suggestions for this aplication would be appreciated.