I plan on getting an Expedition in the near future, very near future, and I'm just trying to get some info beforehand. I was looking at cat backs, and had a question. I read on some manufacture's website that when the tip is at the very back, facing backwards, their's a good chance that carbon monoxide may force it's way into the cabin, and that the back will become very dirty, fast. Are both of these true enough that I should not get a rear facing exhaust??

 

doesn't anybody know

 

Both of these are true. Lots of folks seem to have been happy with the Gibson Swept Side. You might want to check out the aftermarket/exhaust sections of the board.

Cheers!
K.

 

is there enough danger in the carbon monoxide poisoning to stay away from a rear exit exhaust?? i've seen a lot of people with dual rear exit exhausts on SUVs, and i love the look.

 

I have a custom cat back exhaust on my 98. Flowmaster 40 series with a single in/dual 2 1/2 out leading to 5" beveled chrome tips right under the rear bumper. I heard all the stories also. The Carbon Monoxide is a concern if the vehicle is sitting still with a leaking rear hatch gasket, or traveling with the rear window open (which is not an option here). I have had NO problems and love the looks I get when I give her a good romp!
Don't forget the performance intake to help out.

 

that's just what i needed, a personal testimonial. now i'm getting that for sure. you don't happen to have any pics do you?? and how do you like the set-up, interior noise wise??

 

 

I will take some pictures after I can see them again. So much snow and salt on them right now. The interior noise isn't too bad. Very mellow around 55 w/overdrive off. Starts to pick up interior resonance as speed increases, but I don't find it too loud. A lot depends on the muffler that you choose. Do you research and ask around. I went with the Flowmaster 40 series with Delta Flow technology. It is the most aggresive sound but not as loud on the inside as previous ones. They have an awesome web site. Check it out.

Good Luck...

 

I recently purchased a 2001 Expedition XLT. My first modification was removing the stock muffler and installing an aftermarket brand. I went to my local muffler shop and on the recommendation of the manager, I had them install a 40 series Flowmaster with single 3" out (personal preference as duals work just as well). According to the manager, this was the loudest of the Flowmasters. However, the manager warned me that all the new 2001 Ford SUV's, because they are environmentally emissions friendly, utilize 4 cats, which in themselves keep the engine relative quiet. Thus this vehicle, even with the Flowmaster muffler, would not be as loud as some other truck or SUV with the same exhaust.

Not knowing what to expect, I picked up the vehicle later that day, and upon turning on the engine, I noticed a little bit of increased noise at idle. It wasn't til I put the transmission into drive that I really heard this engine growl. It was extremely loud, particularly when accelerating at low speeds. In could literally feel the entire vehicle vibrate as I accelerate from stop lights. At highway speeds, the noise is not noticeable unless I open up the accelerator full throttle. I definitely make other motorists heads turn when I accelerate. However, after the modification, I did not experience any appreciable performance gains. It wasn't until after I had my stock air intake system replaced with an aftermarket (Volant Air Intake) that the performance increase really became noticeable. The combination of air intake and high flow muffler is awesome. The entire modification only costed me about $350 ($150 intake and $200 muffler and exhaust). If you are not looking for an obnoxiously loud muffler, than you may consider either the 50 series Flowmasters, 40 series with Delta Flow, or the Magnaflow mufflers. I believe the manager mentioned that with Magnaflows, you would gain the most in fuel efficiency (least restrictive of the mufflers). In hindsight, I perhaps should have opted for the slightly less obnoxious Magnaflows or one of the 50 series Flowmasters, but nevertheless I do not regret my decision for the 40 series.

Thanks
Dennis

 

cool guys, thanks for the input. if anybody else has any muffler recommendations, let me hear them.