I have a stock 09 Ultra Classic. I would like to change the pipes to get a little more low Harley rumble but don't wont anything too loud, I like my music. I'm thinking about buying the American Custom slip on bombers with the mid range baffles. The price is good and I like the looks of them. I checked this site and didn't find any recent threads on these pipes. They are relatively new to the market and would appreciate any comments members may have, good bad or indifferent. How do they sound, any improvement in performance, do they run cooler, is it a reputable company, etc?