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High flow cats???

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Old Aug 29, 2009 | 01:27 PM
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hondaman24's Avatar
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High flow cats???
I just got a 40 series flowmaster on my 03 5.4 f150 and i was wondering would it be louder if i replaced two of the four cats with magnaflow high flow cats?
 
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Old Aug 29, 2009 | 01:49 PM
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4wd150's Avatar
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From: New Jersey
take all four off and replace with 2 high flows. i have a vid of my truck but with a super44 muffler. let me know if you would liek to see it
 
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Old Aug 29, 2009 | 02:22 PM
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LincolnMarkLT20's Avatar
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Originally Posted by 4wd150
take all four off and replace with 2 high flows. i have a vid of my truck but with a super44 muffler. let me know if you would liek to see it
I would like to hear it.
 
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Old Aug 29, 2009 | 02:24 PM
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rudes's Avatar
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From: TEXASS
post that video up man!
if you have a before and after vid that would be even better
because im doing this very soon
 
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Old Aug 29, 2009 | 03:45 PM
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yes. chop off all 4 cats, and run 2 high flow cats. huge sound difference.
 
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Old Sep 1, 2009 | 01:44 AM
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If you can legally run 2 cats, go for it, oherwise yes it will be louder with only the rears changed out.
 
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Old Sep 1, 2009 | 10:22 PM
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Andy-jr.'s Avatar
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It will be louder, check out my video in my sig. I have the magnaflow high flow cats with a Magnaflow muffler. You will like them.
 
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