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Old Apr 19, 2006 | 12:35 PM
  #1  
i1dery's Avatar
i1dery
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From: covington wa.
what if

On my 89' f250 460 I have this catylitic converter thats about 28" long,
What would be the pro's and con's if i were to remove the muffler and
run a straight 3" pipe out the back? would my large cat act like a
muffler and still be somewhat quiet, or would it be just to darn loud.
 
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Old Apr 19, 2006 | 01:03 PM
  #2  
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From: Pleasant Hill, MO
From what I've seen, these trucks' mufflers don't do the quieting. The cats do. If you can get away with it, chop off the cat converter. You'll gain more performance and it'll be a little louder. The muffler will still be quieting it down a little.

Ryan
 
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Old Apr 19, 2006 | 01:51 PM
  #3  
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From: Racine county, WI
Originally Posted by i1dery
On my 89' f250 460 I have this catylitic converter thats about 28" long,
What would be the pro's and con's if i were to remove the muffler and
run a straight 3" pipe out the back? would my large cat act like a
muffler and still be somewhat quiet, or would it be just to darn loud.
Have no worries cutting the muffler out of that system. The cats do quite the system down a lot and running a strait pipe back from them actually sounds good.
 
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Old Apr 19, 2006 | 02:07 PM
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From: covington wa.
sounds good, but in my state the liberal state of washington i have to keep my cat on
for another 8 years, now if it wont hurt my emmisions testing, im thinking i might
take the muffler off, anf if its not to ridicously loud.
 
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Old Apr 19, 2006 | 02:19 PM
  #5  
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From: Pleasant Hill, MO
it won't be obnoxiously loud without the muffler. They still may legally require you to have a muffler, so getting a new one might have to be an option.

Ryan
 
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Old Apr 21, 2006 | 04:39 PM
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From: Elkhart IN
get a gutted muffler, still appears legal, illegal sound
 
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