Dual 4" or single 5"

ZombieHNTR · Aug 10, 2011

Looking to replace my exhaust, I plan to run a 4" down pipe but woundering what would be more beneficial with a DPF delete... a 5" back or dual 4". I know the dual 4" Ys off the delete pipe.

Erikclaw · Aug 10, 2011

Flow wise it won't make any difference. Aren't going to see a difference, I have heard at power levels around 1000 or so is when a 5" would help. Now sound wise they are different. I run a 4" Flow Pro w muffler and like it. Quite cruising and will growl under WOT.

Jeff@Spartan · Aug 10, 2011

4" downpipe and 5" downpipe back.

Shootingstar · Aug 11, 2011

08stroker250 said:
4" downpipe and 5" downpipe back.

you got any sound clips of your new exhaust?

DieselFreak92 · Aug 11, 2011

Personally I had always thought diesel should come with a 5 inch exhaust from the factory :ford::ford:

ZombieHNTR · Aug 11, 2011

I've heard a friends set up with a 4" down pipe and 5" exhaust and honestly it didn't sound any different then mine right now with 4" down pipe back, but the plan now is to get a 4" down pipe and full 5" exhaust.

Danbonzo · Aug 11, 2011

4" DP to a 4" delete pipe to a 4" straight piped Magnaflow. No complaints.

Petro · Aug 11, 2011

4" straight pipe from the turbo back on mine, sounds alright but i wish it was louder and had more chop like my 7.3, So does the 5" make it sounder deeper or what? Im very curious about this

Dzchey21 · Aug 11, 2011

i had trobles with my duals after a couple years tearing the welds for the hangers

I would run 4 inch single honestly...

Jeff@Spartan · Aug 11, 2011

Shootingstar said:
you got any sound clips of your new exhaust?

I don't. If I think about it, I will make one tomorrow.

bigrpowr · Aug 11, 2011

mine is 4" dp to 5" and sounds like this. at this time it didnthave a 5" delete or a downpipe..but its definitely deepr and throatier at full pitch than a 4" exhaust.

http://www.youtube.com/watch?v=TNwxOTkZSVU