So here is what we did. My friend wanted a little more zip in his UC so he had me put on a set of Rush slip-ons (1.5 inch baffle), with the Arlen Ness Big Sucker air filter kit. We then took it to the local dealer and had them do the map download. The sound of the bike is great and the Rush slips on look great as well as the Ness air intake. Overall it seems to have a lot more pep and is noticeably quicker off the line as well as sounding awesome. Now what is important is that we did not add an Electronic Fuel Management system, only the Harley map download. He rides his bike easy never really getting on it too aggressively and mainly 2 up with his wife, together they weigh in at maybe 280 - 300. How do you think this setup will be over time? And...should we add a fuel management system? Thanks in advance for you assistance.