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Exhaust 5.7 HEMI Exhaust Discussion


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Old 10-10-2010, 09:00 PM
MidwestJ MidwestJ is offline
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Default Magnaflow Y-Pipe installed

So I ordered the y-pipe (part no. 10778) from AutoAnything for $26.+ with free shipping. It showed up after I had my appt with the muffler shop to install my magnaflow 18" muffler so I had to wait two weeks with only the magnaflow 18" installed.

Fast forward to yesterday.

Muffler man told me $80-90 to install over the phone. Based on other threads, I though that was reasonable or comparable to other guys.
He also advised it would take roughly 1.5 hours.

Get to the shop. He puts truck on lift-eyeballs it and goes to cuttin.

Took roughly 45 minutes to install and he checked it real good for leaks. So far-no leaks and no codes thrown according to the EVIC.

Initially when I discussed having the Y-pipe installed two different muffler shops were really hesitant and tried to dissuade me from doing this. They were fearful of codes. Maybe I just didn't explain what I wanted thoroughly. When they put the truck on the lift though-the welder wasn't hesitant at all.

Attached are some relevant pics:






Notice-you want the 2.5 inch dual inlets according to this measurement. It looks like I'm a little off and the pipe may be closer to 2.25 inch on the dual inlets but I bought the 2.5 inch part (see part no. above) and it's workin fine. ***EDIT*** I just re-measured. You DEFINITELY want the 2.5 inch dual inlets. The measurement was closer to 2.5 inches than 2.25.




Too early to tell about performance increase. I'd say it does feel a little more responsive by my seat of the pants feel. Not sure on mileage improvements yet though. Again-too early to tell.

Last edited by MidwestJ; 10-10-2010 at 09:21 PM.
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Old 10-10-2010, 09:02 PM
erm
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Nice part. It looks a lot better than the crimped stocker that's for sure!
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Old 10-28-2010, 02:45 AM
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raymegacab raymegacab is offline
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I also did this same exact mod after noticing that crimped pipe one day after changing my oil. You cant beat this mod for the low price. I paid 80 for parts and labor and did notice a slight increase in performance and deffinantly increased mpg. Do you know if just replacing the midpipe or cats alone on these trucks will increase performance?
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Old 10-28-2010, 10:21 AM
jkulysses jkulysses is offline
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This is one of the things on my to do list. After having the Aeroturbine installed on mine with no factory resonators it's almost like I can here the restriction towards the front of the truck but i'm not sure if it's this y pipe, the cats or the stock exhaust manifolds. I'm just going to start at the y pipe and go from there.
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Old 10-28-2010, 10:25 AM
jkulysses jkulysses is offline
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O and did you happen to cut apart the stock crimped one to see just how much it was restricting flow?? I did this same mod to my 2002 F150 when it was brand new and when I took apart the stock setup the pipe from the drivers side was actually narrowed down to about 1.5" of flow on 2.25" pipe so it was a noticeable improvement going to this magnaflow y pipe.
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