4" or 5" exhaust?
 

My father inlaw bought an 08 dodge 6.7!!! So excited!!! He had to take it to the dealership the other day because of a boost senser. The guy at the dealership sayd it needed to do a regen. Well the light still on so he wants to get rid of that crap :yeah: so we are looking at an egr delete dpf delete and a smarty tuner!! To delete the dpf we are just going to go with an aftermarket exhaust and my ? is which do yall like better? I have seen alot of guys putting the 5" exhausts on the 6.7s and was wondering if they sound better than a 4"? Is there any real performance gain over a 4"? Which sounds better?? Thanks guys!

The sound between the two are very comparable. I've stood next to both and if it was not for the larger diameter of the 5 inch pipe hanging out the rear, I wouldn't have known better.

No big performance gains between the two either on a mildly modified truck.

James
RSD

the sound is mostly in if you use a muffler or straight pipe 4 inch looks stock 5 inch is most definitely not.

---AutoMerged DoublePost---

i kind of like my 5 inch

Ok i didnt thank it was really that much different other than looks. He probly will want to straight pipe it tho so 5inch is probly what he will go with :tu: thanks

5 inch straight pipe is gonna be LOUD :rocking:

i would 5" it with a resonator that would sound perfect imo

WE LOVE LOUD!!!

5" :rocking:

5" get my vote, especially on the Cummins.:tu:

depends on what you like. some guys like no muffler and some guys dont. i have had guys come back to me for a muffler delete pipe and some come back for a muffler. i got a 5 inch with magnaflow muffler and i like it.