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Custom Dodge Ram Performance Mods - Engine - 5.7 HEMI V8 Discuss modifying your Dodge Ram with Performance Parts and Accessories!
Factory Spec: 5.7-liter HEMI® V8 engine - 390 horsepower, 407 lb-ft of torque.


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  #1  
Old 06-02-2012, 08:13 AM
RTBenny RTBenny is offline
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Default Is the stock Y pipe really a problem?

I was under my truck changing the oil a few days ago and was looking at that crappy factory y pipe everyone is changing out. But upon looking harder I noticed the pipe come from the drivers side manifold passes under the transmission pan and is literally flat on the top side. That means that the exhaust from the left bank of the engine has to go through a pipe only half of the diameter of the right one. This can't be good for performance. Has anyone else caught this? Maybe changing just the y isn't really the best way?
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Old 06-02-2012, 08:43 AM
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alot of people on here have been changing the Y pipe with the magnaflow y pipes.
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Old 06-02-2012, 09:12 AM
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Yeah, something I was thinking of doing myself. Now that I looked more though, I honestly don't think it will help that much unless even more pipe is replaced. Anyone understanding what I'm talking about?
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Old 06-02-2012, 09:36 AM
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if you look at some of the pictures people posted when they did their Y pipe...most of them show from the left CAT to the Y replaced.
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Old 06-02-2012, 10:32 AM
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I had mine replaced and the new y-pipe moved back about a foot and a half. the crossover is now by the trans output shaft. I'll be installing my mag hytec 68RFE trans pan when I do my first oil/filter change.
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Old 06-03-2012, 02:56 AM
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Just one more reason to replace stock Y, you can and should replace the left bank along with it.
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Old 06-03-2012, 11:20 AM
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It does help, makes for a smoother less restrictive flow.
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Old 06-05-2012, 02:26 AM
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Yea I got pretty good gains out of It
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Old 06-05-2012, 09:19 AM
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i liked my y pipe swap
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Old 06-05-2012, 10:45 AM
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Mufflex makes a whole Y pipe from behind the cats to the 3" merge for the 3rd gen Rams. We kinda expected a 4th gen version by now.
Magnaflow lists a replacement Y pipe with cats and better merge, but it seems to never been in stock, anywhere. Maybe an upcoming item, since most 4th cats are still under warranty.

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