I paid quite a bit for this exhaust kit @ $840.00, but I feel like I got what I paid for. I am very happy with the quality of the construction and how well it fits under my truck. I love, love, love how it installs so much like a factory exhaust system, and expect to get a long life out of it. It is a little louder than I expected. There is a pretty healthy drone at exactly 55 mph, which is 1700ish rpm’s in sixth gear on my truck. With that said, at 70 mph you can barely hear it, which I think is nice. This system seems it’s loudest under 2000 rpm. When you put your foot into it, it quiets down nicely with a deep tone. I have a hard time believing this part, but I swear my fuel mileage is up about 1 mpg on average.