C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

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Old Jan 10, 2005 | 10:11 PM
  #1  
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Default x or h

do h-pipes cut down on resonation as well as x-pipes or should i just go with an x-pipe?
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Old Jan 10, 2005 | 10:17 PM
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this is an age old debate... I will have to defer to NASCAR on this one... They use an X-pipe. That has to mean something.
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Old Jan 10, 2005 | 10:25 PM
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i was just wondering because it looks like it would be easier to put an h pipe in my exhaust instead of trying to make a x pipe fit
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Old Jan 10, 2005 | 10:26 PM
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yea, well... I know what you mean.

An H-pipe will help... but I think an X is better.
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Old Jan 11, 2005 | 11:24 AM
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has anyone replaced the H pipe on our stock LT4s with an X pipe? a guy on grandsport registry said he did it and gained 15rwhp although i dont know if he took the resonator out as well or not. anyone have more info on this?
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Old Jan 11, 2005 | 11:34 AM
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I can tell you this much... I have EM longtubes feeding 3" pipes from the collectors to a Dr. Gas X-pipe. From there, 3" pipe to PowerEffects (no resonator of course).

It's loud! I do have resonance at lower RPMs. The neighbors can hear me coming 1/2 mile away and I'm thinking that I'm starting to lose hearing in my right ear...
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