I just installed this on my 2020 TB with 5.3. My son and I did it in our garage. The fit is quite good overall. The tips look awesome. The sound is really nice. Deep rumble, not too loud. You get a little of the decel pop sometimes when it downshifts which sounds good. There is some drone in the cabin which isn’t bad at all (only slightly more than the more expensive Corsa cat backs I’ve had). There is some of the “helicopter drone” that the flapper in the stock exhaust is supposed to prevent.
overall, I would do it again, for $500 it’s a good deal.