Hi Guys...I haven't posted in a while but I've recently traded my 2010 FXDC for a 09 Road King Classic with the 103 upgrade. About 3K on the rebuild, almost 19K on the bike (love it, by the way...!). Rush slip-ons, stock breather and the MoCo download. I believe that the tuning leaves some to be desired. I had a K&N high flow, a TFI and Rush slip ons on my Dyna (ran awesome), and I'm thinking that the King would benefit from this. She starts hard sometime, has a bit of popping and sounds "tight" when I shut it down. Am I accurate in my line of thought? Doesn't it need to breathe or does the download make the proper adjustments? It just feels like a timing issue to me. Your thoughts are appreciated.