I'm in the market for a new turbo back system for my rig, now i know there are endless amounts of topics about this but i wanted to make my own. So basically i want to know the differences in basically the sound between the 2 sizes keep in mind i will be goin with turbo back. also if there is benefits of one.

 

all I can say is I have a full 5 in straight with 8 inch tip and it sounds amazing

 

if you want 4 inch i would just buy a dpf delete pipe cause thats what size your stock is i would go 5''

 

wish i would have went 5 but gona keep what i got

 

5" will have a deeper tone. Put a muffler on it, 3rd gens sound horrible straight piped.

 

my 5in turbo back sounds so throaty

 

I had duals, i had 4 inch straight, and now 5inch straight pipe to 6 inch tip and i dont have any plans of changing back...

 

4 inch will work performance wise and will be quieter on road trips. five inch has a good deep tone. if you do a lot of road driving a muffler might not be a bad idea helps on the drone. also watch out for car alarms, five inch will set them off

 

ow yes i set car alarms off daily