I've been tossing around the thought of puting a 5 inch system with 6 inch straight stacks on my truck and putting some Cat rain caps on it. The things holding me back are the noise since my truck is a regular cab, and cutting a hole in the bed floor which has a Line-X bed liner.
I'd really had to cut a hole in the box and bed liner and end up not liking the noise level or the way they look.

The other thing I have been thinking about is replacing my 4 inch MBRP turbo back exhaust with a 5 inch MBRP turbo back exhaust.

I'm just looking for some feed back from guys that have experience with stacks on a regular cab truck.

 

i put dual turnouts on my a while ago i dont think its really that much louder just sounds good hope this helps

 

I have a single 5" stack on my regular cab, its been on over 6 months and I still love it. It is loud but I can still hear the radio....until I open the rear slide window, thats usually how I drive it. I know I'm wierd but I just love the sound of the little 6cyl.