I have a 2003 FLSTFI with Screaming Eagle II slip-ons. I want to change them to a set of Hard Krome 3" Straights but when I had the SE II's put on I only had the download done. I have the stock air cleaner on and just want to change the exhaust do you think I will need to get another ECM download or should the bike run fine with the swap? I want to get the SE air cleaner and a PCIII later but for right now I don't have the extra $500 or $600 + Dyno testing fee to get it all done right now. I can't even find a PCIII map for my setup on the website so I guess I have to get a custom map from my local Dyno center. Even getting another download will set me back another $150 or so. I just laid out over $500 for the pipes should I just wait another couple months until I'm ready to get it all done or will the bike run fine after the swap?