A few months ago a local muffler shop installed a Gibson SFT muffler on my QX80 aFe exhaust. I went to drain and fill the t-case on my truck and noticed that they forgot to weld the hangar on the inlet side of the muffler. Worked great, simple screw assembly. All I had to do was cut off the extra threaded rod on the hangar after everything was bolted. Some reviews mentioned that the nuts loosen, so I added some red threadlocker just to be safe.