It\'s the pipes!!! I'm running dual 2.5" pipes with a crossover pipe and two Flowmaster 40 series exiting behind the rear tires. I've always thought this setup sounded "ok". A few days ago I cut the pipes from behind the mufflers to start my shackle flip and axle swap and WOW!!! It sounds so wonderfully great now. I love the way it sounds. I feel I'm driving a monster truck now. So next time someone tells you a specific brand sucks or sounds great, it's not that much about the brand, but the location of the mufflers and the length of the pipe after them.