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GT Performance Mods 2005+ Mustang GT Performance and Technical Information

replace cat?

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Old 5/11/08 | 09:33 PM
  #1  
staindreality's Avatar
staindreality
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Joined: October 12, 2004
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replace cat?
how hard would it be and any performance gains from just say buying a hiflow cat from pypes and replacing with factory. would this make my violators a little louder and deeper?
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Old 5/11/08 | 09:41 PM
  #2  
theedge67's Avatar
theedge67
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Joined: July 4, 2006
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From: St. Louis Area
It would probably make them louder, possibly deeper I don't know. There would be a small performance gain...maybe 3-5hp.
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