4.6L General Discussion This section is for non-tech specific information pertaining to 4.6L (Modular) Mustangs built from 1996 to 2004.

no cats stock h pipe

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Old Dec 12, 2007 | 10:03 PM
  #1  
arcticman37's Avatar
arcticman37
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Default no cats stock h pipe

Hey guys quick question:

I have a SLP LM1 with an O/R bassini X and I want to change it up a little just temporarily so I figured I'd go with an H for a while. Would there be much performance loss just CUTTING the cats of the stocker instead of buying a new O/R H??
Old Dec 12, 2007 | 10:06 PM
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Default RE: no cats stock h pipe

yes. the stocker pipe is 2.25" and the aftermarket pipes are 2.5"
Old Dec 12, 2007 | 10:14 PM
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Default RE: no cats stock h pipe

I know the sizes just wondering if there would be a noticable difference?
Old Dec 12, 2007 | 10:20 PM
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Default RE: no cats stock h pipe

ORIGINAL: arcticman37

I know the sizes just wondering if there would be a noticable difference?
its like asking if you put on a mid pipe would you 'notice' any gains? now just think of the reverse
Old Dec 12, 2007 | 10:24 PM
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Default RE: no cats stock h pipe

Just without the cats
Old Dec 12, 2007 | 11:53 PM
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Default RE: no cats stock h pipe

not having cats will not give you that much if any noticable power gain...maybe 1-2 HP.....

but, FYI, everyone on here that has attempted the LM1-LM2's with an o/r H pipe did NOT like the sound at all. Might save you a headache
Old Dec 12, 2007 | 11:59 PM
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Default RE: no cats stock h pipe

^ true but with LM1's. Just too damn noisyand raspy.The LM2's sound GREAT with an o/r H imo.
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