exhaust/mufflers

[lynnw]

I just got a 2003 expedition.It has the 4.6 litre in it.And I am looking to put dual exhaust on it.Could any of you recommend a nice sounding muffler.And what size pipe should I run.
Thanks

 

[XLTman]

Another user here has a magnaflow muffler and it sounded nice i believe the stock piping is 2 1/2 inches

 

[ELVATO]

Was it me?

If I did it again, I think I would go with the 14 inch Maggy.

From what I've picked up at F150 online, if you are going to go with a dual exhaust, I'd go with 2.25 piping.

Let me see if I can find the thread where someone did what I thought was a bad ass looking system. I don't know if he had them or not, but I would replace the cats with Magnaflow free-flowing cats, then do what the guy did. The pipes meet at a Maggy X pipe, then go to two Maggy 14 inch mufflers.

 

[XLTman]

Was that you elvato that posted that nice and shiny maggy pic and then a sound clip a while ago? i should have bought a mag too my thrush turbo muffler is dirt i need a straight through muffler next

 

[davesexplorer]

Not to try and sway you or anything... but I'd do flowmasters. I'm biased though I have one on my expedition and two on my mustang- all 40 series.

Expedition sound clip :

http://video.cardomain.com/Clip.aspx?key=EFCAA9F393BF1745

Mustang sound clip:

http://video.cardomain.com/Clip.aspx?key=CEE73469D6D24F10

 

[ELVATO]

Originally posted by XLTman
Was that you elvato that posted that nice and shiny maggy pic and then a sound clip a while ago? i should have bought a mag too my thrush turbo muffler is dirt i need a straight through muffler next

Yea, that was me

 

[XLTman]

Sweet sound clip elvato i love that low grumble noise damn dave 40 series sounds just about right too me

 

[ELVATO]

It sounds nice at cold start up, but I don't know, it doesn't seem to be loud enough when going. The AFE in the engine makes the engine sound louder than the exhaust. Might want to get some Maggy free-flowing cats in the future, along with maybe a 14 incher.

 

[green03]

yeah if you get rid of the 4 factory cats for some high flow it will be loud..... you could try taking off the rear cats if they aren't being monitored by the rear O2 sensors like mine was....

 

[ELVATO]

The whole cats subject confuses me a bit. Apparently you can use two Maggy cats to replace the four stock cats, and everything still be ok. At least that's what I hear for the F150 trucks.

Should be the same with the Expys, right? Or a 4.6? Hmm...guess I have to look under and take a picture or something.