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Exhaust 5.7 HEMI Exhaust Discussion


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  #1  
Old 11-29-2012, 09:53 PM
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Default inlet/outlet sizes

I've been doing a lot of research on the forms and it looks like the 14inch magnaflow with the Y-pipe.

I have a bad back and I don't really want to get under the truck too look when so many of you probably know this.

So, anyone know the inlet/outlet sizes i need for the muffler and Y-pipe? If you had links to the ones i need that would be awesome!

Is this the Y? (http://www.ebay.com/itm/Magnaflow-10...578204&vxp=mtr)
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Old 11-29-2012, 09:58 PM
HEMI450HP HEMI450HP is offline
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The muffler you need is a single 3" inlet and dual 2.5" outlet, and the y-pipe is the same. Part # for the Y pipe is 10778 and the muffler is 12198.
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Old 11-29-2012, 10:38 PM
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Thanks!

Now I am a little confused, why does the muffler have dual outs and the Y-pipe have a single inlet? Is this not what the exhaust looks like?
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File Type: jpg i2268490.jpg (81.0 KB, 26 views)
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Old 11-29-2012, 11:08 PM
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I guess I should have asked...do you have a single or dual rear exhaust right now? The muffler I listed was for trucks with the factory dual exhaust.
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Old 11-29-2012, 11:31 PM
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Talk to Exhaust Junkie from BSM Exhaust works. He will point you in the right direction.
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Old 11-29-2012, 11:35 PM
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Quote:
Originally Posted by HEMI450HP View Post
I guess I should have asked...do you have a single or dual rear exhaust right now? The muffler I listed was for trucks with the factory dual exhaust.
I have the factory dual.

But why would the Y-Pipe have a single inlet? I thought (i may be wrong?) but doesn't the exhaust come out of the muffler as a singlet and then split at the y-pipe?
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Old 12-01-2012, 02:21 PM
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If you want to use the same factory piping then the parts Matt posted will work.

Your diagram posted is single exit but you stated you have dual exit.
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Old 12-01-2012, 02:32 PM
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Think it was his wording.

Magnaflow Y 10778 is 2.5" dual inlet and single 3" outlet
Magnaflow Muffler # is 3" single inlet and dual 2.5" outlet
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Old 12-01-2012, 03:21 PM
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The y pipe has 2 inlets and a single outlet.
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Old 12-01-2012, 03:31 PM
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the Y pipe goes up near the engine
it collects the exhaust from the left & right banks of the engine, stock ones are flattened & restrict flow



from the Y pipe to the muffler is a single pipe
after the muffler 2 tail pipes run either to the rear bumper or to the sides





yours should sound like this

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