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Old Dec 6, 2006 | 02:18 AM
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Default X pipe ?

Dont yell but what exactly is an X pipe? Im guessing it eliminates the cat. converters by replaceing them...........
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Old Dec 6, 2006 | 03:41 AM
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Originally Posted by D. Togo
Dont yell but what exactly is an X pipe? Im guessing it eliminates the cat. converters by replaceing them...........
No sir, its in addition to the catalytic converters...its function, I believe is to make the exhaust flow smoother and less resticted

No questions are dumb....some answers may be....but, WTF life is a learning experience!

Right?
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Old Dec 6, 2006 | 09:36 AM
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Without getting too much into theories, An X-pipe creates a scavenging effect as the exhaust pulses from the left and right banks. This scavenging effect helps draw exhaust gases from the exhaust port and through the header primaries more efficiently while smoothing the pulses as they're blended in the X-pipe. Though all exhaust manufacturers provide some form of X-pipe in their systems, they are not created equal. On most vehicles the chassis dictates where placement of the X-pipe should be made, I firmly believe the further forward, the better the signal, the better the performance. This especially is important when cats are used that will muffle the signal.
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Old Dec 6, 2006 | 10:18 AM
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Originally Posted by MR Lumpy
Without getting too much into theories, An X-pipe creates a scavenging effect as the exhaust pulses from the left and right banks. This scavenging effect helps draw exhaust gases from the exhaust port and through the header primaries more efficiently while smoothing the pulses as they're blended in the X-pipe. Though all exhaust manufacturers provide some form of X-pipe in their systems, they are not created equal. On most vehicles the chassis dictates where placement of the X-pipe should be made, I firmly believe the further forward, the better the signal, the better the performance. This especially is important when cats are used that will muffle the signal.
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Old Dec 6, 2006 | 11:09 AM
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Vette comes with an "H" pipe. Replacing with a smoother flowing "X" shaped pipe lets it work much better.
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Old Dec 6, 2006 | 11:44 AM
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Originally Posted by D. Togo
Dont yell but what exactly is an X pipe? Im guessing it eliminates the cat. converters by replaceing them...........
Maybe to explain what an X-pipe is in addition to what it does, we should back up a little. The X-pipe is located behind the cats (if you have any). It connects the two tailpipes together for a short length and then separates again. If you think about how two round pipes might meet (not cross) to form sort of an elongated "X", you're on the right track. Where the pipes butt up together, you end up with a cutout common oval maybe 4-5" long and about 2" wide that is very carefully welded together. This interface provides the scavenging described above.

Factory pipes use an H-pipe that mate the two together. A short piece of extra pipe forms the center section of the "H".

Clear as mud?
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Old Dec 6, 2006 | 01:44 PM
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Originally Posted by hayseed51
Factory pipes use an H-pipe that mate the two together. A short piece of extra pipe forms the center section of the "H".

Clear as mud?
What isn't clear is: Why doesn't the factory use an X-Pipe, instead of an H-Pipe.
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Old Dec 6, 2006 | 01:57 PM
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I think you will find only minimal gains even with the best engineered "X" given ideal conditions. This post from Dr. Gas speaks to HP gains!
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Old Dec 6, 2006 | 03:08 PM
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Thanks Again Everyone!
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Old Dec 7, 2006 | 01:01 AM
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This X-Pipe vs. H pipe is a very interesting debate. Toyota trucks dominated the Craftsman Trucks series in 2006 and they use an H pipe.
All that TRD money and still using a H pipe...Hmmmm.
Maybe they have some data?
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Old Dec 7, 2006 | 09:58 AM
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Think of your exhaust as a system.

Stock is; Cast iron manifolds, then cats, then "H" pipe, then overaxle pipes w/mufflers.

You can replace nearly any piece by picking the right combination of parts.

Fully modded exhaust would be; Long tube headers, cats (or off road pipes), "X" pipe, overaxle pipes w/mufflers.
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Old Dec 7, 2006 | 10:19 AM
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Originally Posted by haljensen
... overaxle pipes w/mufflers.
or no mufflers at all.
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