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How restrictive are stock mufflers?

5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

How restrictive are stock mufflers?

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Old 03-14-2008, 12:27 AM
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goatnipples2002
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Default How restrictive are stock mufflers?

At what power level should I look into new mufflers?

Can the stock muffs be gutted?

I have Summit headers, Pypes X-pipe and dumped stock mufflers.
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Old 03-14-2008, 02:55 AM
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greenstreak9205
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Default RE: How restrictive are stock mufflers?

if you put just bout any aftermarket muffler on it, it will free up a bit of hp...stock. they're not much moonies. just buy a set and be happy
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Old 03-14-2008, 04:13 AM
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Rajun_Cajun
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Default RE: How restrictive are stock mufflers?

If you dont want it too loud, just do some Flowmaster 3-chambers (Force -II). I currently have the catback on my car. It is fairly quiet at idle, and then screams when you open it up. Here is a soundclip of my car when I had the 3 chambers, JBA shorties, and BBK catted H-pipe. I have a set of 2 chamber dumps that Im putting in this weekend to compliment the recent MAC LT and o/r H install.


http://vids.myspace.com/index.cfm?fu...9-4ebe299c1f11



If you want, I'll sell you the catback. The tailpipes are abit worn, and the previous owner dented in the pipes a little bit so he could fit slicks.
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Old 03-14-2008, 04:27 AM
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goatnipples2002
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Default RE: How restrictive are stock mufflers?

Really I just want to know if the stock mufflers are a problem now or will be with the nitrous.

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Old 03-14-2008, 06:09 AM
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CHILLERMAN
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Default RE: How restrictive are stock mufflers?

No way to know how much power they cost you unless you do a before and after dyno run. Mufflers are cheap. Pick something out, and put them on, or just keep what you have.
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