I have the Flowmaster Force II and it has a pretty awesome sound, when your cruising it is quiet but when your accelerating and going through the gears it has that classic Flowmaster growl. The set is pretty pricey, I got a pretty good deal on ebay for the set, it is stainless steel so you don't have to worry about it rusting and it was easy to install I did it myself in my driveway, and the look of a dual exhaust is great!! Check out youtube, click in Dodge challenger SE flowmaster dual exhaust, it shows the installation and at the end you can hear what it sounds like.http://http://www.youtube.com/watch?v=61dEvYdAZ8A