The only thing I had to go by was YouTube videos. From what I could tell, I liked the way the UR sounded, especially in the in-cabin videos. In all honesty, I think it could sound better than it does. However, it is very quiet in the cabin on the highway and at light throttle. I would imagine the FR product is just as good in quality. They both sound great with the stock down pipe, but when I bought my exhaust I couldn't find a video with the UR down pipe and the FR cat-back. When I installed the UR cat-back it sounded great, but after the install of the down pipe it was much louder and just not as crisp. It still sounds good, but not great.