This is my first post, on a subject near and dear ... Exhaust. I'm trying to decide what to do on my 07 FLHTCUSE2 too but here's what I've learned about exhaust. There are 3 things, sound, looks and performace. It's easy to get the first 2 but the third, performance, will drive you nutts. On my other bike, a 95ci, I've done the heads, cams, timing, 45 Mikuni etc, etc. But the first time I put it on a dyno, the operator said Grit, "your going to be real disappointed with those Rineharts." There a racing pipe!!! You'll get good high end numbers, over 112 hp was easy, but the torque will suck. It did! If I recall it was in the 80's. The baffles were too open! This was on a FLHT also so I needed torque! (We ride 2 up and tour.) I went thru 3 sets of baffles on the Rineharts. 2 1/2 inch, 2 1/4 and 2 inch. (think that's right ... it's been awhile) The 2 inch baffles producted the best torque, around 107 pds but of course the hp dropped way off and it sounded terrible. (like a metric, if you know what I mean.) I settled on the 2 1/4" to bring back the "potato, potato" sound. Even then the best sound was from the largest size baffle. Last time on the dyno it ran 105 hp and 104 torque but only after tuning the baffles with the insertion of a welded washer/bolt in each muffler. The washers are turned to adjust the exhaust flow. The more "closed" creates more back pressure and each muffler was tuned for peak dyno performance. Now I hear that Rinehart got away from those horrible springs holding the heat shield in place? I hope so because when they fly off there's no telling which state they will land in. It always happens during servicing of the bike too. I'm reading more threads before I spend any money on exhaust for the 07SE. Something tells me that this new 110's exhaust may only need individual header pipes. (to move that hot temperature away from my right thigh)