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evo x downpipe gains?

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Old Sep 11, 2009 | 04:57 PM
  #1  
carlosf's Avatar
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From: torrance
evo x downpipe gains?

does anyone know the average power gains you will get with an aftermarket downpipe if your running the stock cat?
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Old Sep 11, 2009 | 05:38 PM
  #2  
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From: Smallville, KS
No.
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Old Sep 11, 2009 | 07:17 PM
  #3  
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From: bayshore ny
anywear from 8 to 15 whp
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Old Sep 11, 2009 | 07:40 PM
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From: the burgh, pa
Yeah anywhere up to 20 hp. It depends on the other mods though too...
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Old Sep 11, 2009 | 07:42 PM
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according to AMS, upgrading the downpipe will gain.... 0 horsepower
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Old Sep 11, 2009 | 08:00 PM
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Are you asking about the downpipe or the downpipe + O2 housing?
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Old Sep 11, 2009 | 08:06 PM
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From: the burgh, pa
I was assuming #2
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Old Sep 13, 2009 | 02:02 AM
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From: C_l_f_r_i_
even if it was an o2 housing replacement, with the stock cat, the restriction is still 100% there.. IMHO, 0 HP gain.
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