HI GUYS, I have a new 2011 Roadglide Ultra 103 and I was on the phone with a well know dyno guy here and told him what I was planning on doing. It was the Vance/hines power dual headpipe & slipon power muffler, or Rhineharts with quiet baffles/torgue baffles. He suggested the Rhineharts but, the main thing is you need backpressure for torgue which touring bikes need hence, the quiet baffles. The other issue is cooling it down because the 103's run hot like the 110's. He also reported that the power commander tuner is best way to go verses the super SE tuner although he is working with a dealership to reset the SE Super tuner for the values he can get with power commander. Also recomended the alen ness big breather or Harley elbow cone-air filter for big air. Hope this helps you I'm going this route the guy is well known and travels the circut tuning bikes.