I have duels but i don't know the difference between true duels. So? But, I don't know what a good way to increase sound? See, I absolutely love the type of sound I get now, but if I could just get it a little louder that would make all the difference. Not sure what a cat back system is, but which of these do you think will increase sound without changing the actual type of sound: cat back, an exhaust chip, adding a X or H or...pipe, or a different muffler? And advice will help alot, thanks! Looking under $500

 

Off road Xpipe.