exhaust question

[87mustang]

would there be any problem with removing all of the exhaust from the cat back and simply putting a turndown where the cat was, then welding the hanger to the turndown??

i am only concerned about the engine, not the embarrassments (EPA and current federal government)!!

[powerhoghp]

Diesels don't need backpressure like gassers, so no, it won't harm the engine at all. The only thing that may result is slightly more smoke, louder exhaust, and possibly a slight hiss at idle.


This belongs to one of the members on the .Org and it's a turndown just like you mentioned.

[87mustang]

the previous picture is basically the exact same thing i did. it's definitely louder than the muffler delete i had before, but it's not annoying in the cab, and with it being an 03 the turbo sounds like a jet when you first take off.

i might still end up putting a 4 inch downpipe on it, but it will still be set up the same way.

[mavisky]

The major downside to doing that is that you'll be making it very easy to introduce exhaust fumes into the cabin if you're sitting at a light with your windows down. I'd reccomend spending a couple bucks on some 3.5" straight pipe and at least getting it behind the rear most door before doing the turndown.

[rebelranger]

Powerhoghp, What's up with your front leafs it looks like there is only one in the pack? Also how are those Thornbirds treating you?

[carolinaboy02powerstroke]

Nothing wrong with it, but you are going to cover the underside of your truck with soot

[bfrank81]

Originally Posted by mavisky

The major downside to doing that is that you'll be making it very easy to introduce exhaust fumes into the cabin if you're sitting at a light with your windows down.

That's what I was thinking! It's a good way to die! Why not just replace the muffler and cat with delete pipes and run it out your stock tip?

[87mustang]

have drove my truck about 750 miles since i cut all the exhaust off and added the turndown.

-have not once noticed exhaust fumes in the cabin
- still sounds awesome
- cost almost nothing
-no codes

-and maybe if the soot coats the underside of the truck, it will be better protected than it currently is. ford did an EXCELLENT job of priming and painting of early 00's super duty beds!!

[mavisky]

I'm gonna call bull**** on that one. No exhaust fumes? Hell I can smell them in my Excursion with no cat/muffler on it and the exhaust exiting in the stock location. Sure I'm not choking on them, and it doesn't smoke up the cabin, but I can certainly catch a whiff every now and then.

[87mustang]

sorry mavisky, i stand corrected, i should have said i have not noticed any more fumes than when the exhaust was in the stock location.