Man, don't get a Flowmaster 50HD, I put one on my truck and it droned in the cab something fierce and right at interstate cruising speeds. It also rusted to sh*t inside of three years. They also really inhibit flow due to their chambered design. Aside from the drone, it did sound nice, but there are a lot of mufflers out there that will sound nice, won't rust out and aren't nearly as restrictive...

 

^^^ What he said!!!