New exhaust?

[hellagood12]

Hey just want to get some input on an exhaust system for my 2006 sierra 4.8 sl crew cab! I wanna do the headers and cat back single. Any suggestions would be great. Also any idea on the gears for these trucks? It has the tow package.

 

[paulcapasso]

I have a 03 ext cab 2500HD, I put the Flowmaster american thunder series on mine and noticed a diffrence. It's a bit louder then expected and some interior drone but sounds great. Summit Racing offers it for around 375 or less, I dont remember but it bolts up. I just purchased some BBK shorties from SR and they should be here today. I will keep you posted.