With a lack of knowledge in mechanics, you would suggest getting higher performance headers and mufflers, and then having the computer retuned? Does Harley do that, or would I need to try and find a motorcycle shop near me?
You don't have to buy "high peformance " headers per say, but why not if going through the hassle.
The issue is the catalytic converter on the newer bikes is inside the factory header, and not in the mufflers like it used to be. That is what is restricting the air flow and trapping the heat, and its right there underneath your right leg.
You can look up some of the DIY how to's and de-cat the header on your own, find a muffler shop to do it, or buy a stock 2009 header and get the extensions /adapters for the O2 sensors.
My opinion, and I'm certainly no expert, is that if I am going through all this hassle, I might as well get as much out of it as possible.
You can buy headers from Fuel Moto, Drago's, V&H, etc, then there is do you want true duals, an "x" pipe or crossover, or a 2-1 system.
But the main thing, is getting rid of the catalytic as far as the heat is concerned. How you choose to go about it, is your decision. Everyone likes different setups, I had an X pipe on my Ultra Limited, my CVO had true duals, and now I'm going with a 2-1. There is no end all be all of how to get the performance out of the bike, the main thing is choosing components that complement each other, and making sure the "person" doing the tuning actually knows what they are doing, or going with a tuning device that is user friendly and comes from a reputable company with a good base map. Those are decisions, you will have to research and make on your own, you will get 5 million different answers on the forums, mostly based off of what people have on their bike. Few people have actually had first hand experience with different setups, and this is where talking to the shops comes in handy, because they have seen it all.
Like I said, I'm no one special, not an expert, can just offer advice based on what I have gone through with the bikes I have owned. At the end of the day, what matters is that YOU like what's on your bike, and that you're happy with how it performs.
Just my $0.02