I went from a 2.5” full exhaust to the Treal 3” trail full exhaust because my riding group expressed their concerns about how loud my exhaust was. I am very very happy with the quality and fit of this product. It even matched up fine with my big turbo from another SXS company. I installed it myself but an extra hand would of made it easier. And I have only went around the block, but it is incredibly how much of an improvement I got. The instructions are accessible by scanning a QR code and are great if you have an extra hand to help. But if you do it on your own like me. I think I would advise you not to try installing the v clamp at the turbo unit last. Mock it up loosely then connect turbo to head pipe. Then tighten everything up. Quieter in person than sound clip I think with front resonator.
I just installed the Side Trail exhaust on my X3. The sound is a nice deep tone and easy on my old ears. 30+% quieter than the removed HMF exhaust. The Treal exhaust is very high quality. I have the EVO 3R tune. I noticed the car took a minute to adjust when I first started it. I had some back firing or low rpm bogging and then after a few minutes the car adjusted and ran normal. I did use some copper anti seize (sensor safe) on the O2 Sensor.
I experienced a problem while mounting the rear muffler due to me keeping the HMF frame support. The front holes fought me a little because the HMF mounts holes need to be ovaled. The V clamps come with normal non locking nuts. I grabbed some Fuji locking nuts to double nut the V clamp.
I would definitely buy this exhaust again and recommend it to someone that wants high quality, dampened sound while keeping the higher flow.