Great research Bendboater !! I just installed the twin loop exhaust and it is quieter for sure. Cruising speeds (4800-5000 rpms) I could really tell a difference. It has a different tone when you depress the LOUD pedal for sure. I put a SLP super quiet muffler on my old trusty Rzr 800 and it really helped with that machine it gets rid of that horrible droning noise at cruising speeds. At slower cruising speed with the general I can hear my stereo and can hold a conversation easily. Worth the money to me. I have not done any sound deading matting yet. It has to wait for a bit my garage and enclosed trailer need insulation first. It probably has been covered in other posts my general needed extra shimming to clear the frame and get the clearance between the exhausts even. Nothing too bad but had to take apart a few times and only lost one nut that dropped and went under the transmission LOL