I recently bought a Two Brothers slip on muffler online. I installed it on my 2011RT limited. I did not have a chance to ride my for a few days after that. When I finally did I found a major problem that was going to force me to take it back off. Because of the new direction the outlet is on my RT the exhaust fumes were coming back in to the pilot area for lack of a better description. If I was over 50 MPH I could breath but under 50 my eyes watered and I was breathing the fumes . I contacted the customer service department and found this was an issue that had been addressed in the past . Two Brothers have a turndown pipe that redirects the fumes for about twenty (005-SST1 SS Turndown Tip ). I thank the customer rep DS for his help and fast response. Sounds great and no more watering eyes.