Not looking to spend crazy money right now but would like some more power out of my dually, maybe get some nice black smoke some times when I want it. I got 3-4 inch turbo back straight pipe and it doesn't roar or whistle to loud, I'd also like some loud piles

 

do us all a favor and never blow smoke. its not cool and you only hurt the industry.

as far as upgrades the basics are gauges, chip, intake and exhaust. after that you are going to be spending some good money.

if you have a straight exhaust now its not going to get much louder by putting different exhaust on it.