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Exhaust 5.7 HEMI Exhaust Discussion


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  #11  
Old 07-09-2013, 11:17 PM
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Am I going to need to do any tuning after I do this setup and a cold air?
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Old 07-09-2013, 11:53 PM
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A tune would definitely work nicely with a free flowing CAI amd your exhaust. You would notice the gain for sure with that.
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  #13  
Old 07-10-2013, 12:17 AM
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Sounds like a plan
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  #14  
Old 07-10-2013, 12:33 AM
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This may be a dumb question but will my exhaust be quieter by doing the true dual setup because lest exhaust will be going thru each muffler versus doing it all thru one muffler or will it be louder because I have exhaust going thru two mufflers and not one.... I know the full 2.5 in piping will make it louder anyway I guess
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  #15  
Old 07-10-2013, 12:51 AM
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Also what's the difference between doing a X or h pipe
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Old 07-10-2013, 01:44 AM
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An X-pipe will flow better because it acts as a scavenging system. An H-pipe only equalizes the pressure between the two pipes. So essentially an X-pipe is better.

I could see it being a bit quieter because you now have two mufflers on your truck with the same amount of power and exhaust flow as a single muffler would get. But it will be a very minimal difference.
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  #17  
Old 07-10-2013, 03:44 AM
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I think you'll be fine with the sound. I have 2 mufflers also but in a completely custom setup and when I have my cutouts closed it is still louder than what it would be with the stock set up. I went from flowmaster to magnaflow though and the sound has def changed but in a very good way. I think you'll be happy with what they do.
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  #18  
Old 07-10-2013, 03:46 AM
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Also where they put the mufflers will effect the sound as well (atleast I believe it will). Are you going to be putting the mufflers further back or up near the x pipe?
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Old 07-10-2013, 04:39 AM
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i have changed exhaust on several older vehicles
exhaust shops only 1/2 listen to you, so it is best to draw a sketch of what you want

first i knew that i was prone to blowing transmissions, both Standard & Automatic
so i ran header pipes back almost to the transmission
then i wanted a center section with a H pipe, going from the headers to in back of the transmission, then the mufflers on back to the rear axle of the vehicle with a set of dump tubes that were slightly turned out & down

I wanted the center section sleeved & bolted on
the *!(%#* muffler shop welded everything together
i had to drop the headers at the exhaust manifold & drop everything as a unit to change out the transmissions
I was not a happy camper

Good Luck with yours
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Last edited by GTyankee; 07-10-2013 at 04:41 AM.
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  #20  
Old 07-10-2013, 08:53 AM
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Quote:
Originally Posted by RAMinator13 View Post
Also what's the difference between doing a X or h pipe
I've copied/pasted what I've posted on these boards B4 -

Here's some information you may find usefull -

H Pipe:

An H pipe helps equalize the exhaust pressures between the two banks of tubing as the hot gases and sound waves travel down the tubing. This, in effect, relieves the exhaust pressures as they travel through the H tubing, generally creating an increase in torque. This will also give an added sound reduction when the sound waves combine inside the H tubing.

X Pipe:

An X pipe will actually help to scavenge exhaust pulses from one bank as the opposite exhaust pulse passes through the X, thus creating a vacuum effect at the valve, resulting in a cleaner burn in the cylinder. This generally equals added torque and, like the H pipe, a reduction in sound as the sound waves combine in the X pipe.

Y Pipe:

The Y pipe, which works well on several applications, utilizes a dual exhaust off the manifolds/ headers and runs back a specified distance, then the two pipes enter the Y pipe and become one larger pipe. This Y helps each bank to scavenge the other as the pulses travel down through the Y and are joined together into the single common tubing. This creates a vacuum in the exhaust valve, resulting in a cleaner burn in the cylinder. A sound reduction is also achieved as the sound waves combine in the Y pipe.

Personally, I've had both in the past and the biggest difference I've found between H & X pipe is predominantly sound. As long as all things are equal, there's no significant difference in performance between the two.
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