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| 6.4L Performance Parts Discussion What has or has not worked for you? |
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08-13-2008, 05:38 PM
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4" downpipe-back exhaust
I've decided to cut right before the coupler on the downpipe, then run flex until I can get a straight shot with 4" steel pipe to the stack kit. I figure this should be a dramatic increase over the 3.5" pipe with the giant gay flange. I'm shooting for less back pressure, free'd up HP, and maybe possibly like .0001 better mpg
 I'll post pics tomarrow when I finish
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08-13-2008, 05:39 PM
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think biggest thing youll gain out of it is lower EGTs
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08-13-2008, 05:41 PM
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Cool. Look forward to the pics.
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08-13-2008, 06:10 PM
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I dont know if she'll be purty, but at least she'll be 4 inches in diameter
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08-13-2008, 06:17 PM
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Quote:
That would def be an added bonus 
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08-17-2008, 06:36 PM
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Here's some pics guys
          
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08-17-2008, 06:41 PM
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sweeeeeeetttttt!!!!!!!!!!!!!!!!!!!
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08-17-2008, 06:45 PM
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when were you in DC and why didnt you tell me!!!
im 15 minuets from there!! WTF
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08-17-2008, 06:48 PM
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Quote:
 I left yesterday at like 3 ish and got back home in PA around 2 ish today. It was kind of a spur-of-the-moment thing.
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08-17-2008, 07:48 PM
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looks good have you notice any differance on the egts? I did the same thing but modified a 4" pipe from the coupler to make the bends to the crosmember then went to a 5" straight pipe with 6" tip my egts are 1200 at the max with the sct 1.22 tune and great sound.
i
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