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1994.5 - 1997 7.3L Power Stroke Diesel  

Exhaust size?

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Old Oct 20, 2011 | 12:50 PM
  #1  
79OldBone's Avatar
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Exhaust size?

Will I be hurting anything going from 3" all the way to the stack kit up to 5" vs. doing 4" after my 3" down pipe to the stack kit? Are there gains/losses with going one or the other?

I'll only be running stage 1 injectors and a custom tune eventually. For now its just the 6pos ts tune with stock injectors.
 
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Old Oct 20, 2011 | 01:46 PM
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I would go to 4". The stock exhaust is 3 1/2" so you would be down grading at 3"
 
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Old Oct 20, 2011 | 04:53 PM
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It won't hurt you... I would personally open it up but if you think about it the stock pipe is 3 1/2" but only after the cat which is pretty close to where you will be getting up through the bed anyways...

Long as you get rid of the flat downpipe, i think it won't really matter what you do for that couple of feet after that to the stacks...
 
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Old Oct 21, 2011 | 09:41 PM
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From: Phill Mo
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this is mu 5in cat delet hooks right up to my 3in dpthan in to 5in elbow, up threw the bedin to 5in t pipe, ( 2 5in elbows with backs cut out and weilded togather)in to 2 6in miter cut coal rollers lol
 
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Old Oct 23, 2011 | 09:17 PM
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I got it. I just did 4" after the down pipe to 5" stacks. someone already had stacks in the bed tho and the hole is kinda back to far so it doesnt sit nice against the bed. Gonna have to oblong the hole some
 
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Old Dec 17, 2011 | 03:05 PM
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JG96. Where did you get a 5" cat delete pipe from? I've only found the diamond eye one.
 
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Old Dec 17, 2011 | 04:16 PM
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From: Phill Mo
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Originally Posted by bleeds blue
JG96. Where did you get a 5" cat delete pipe from? I've only found the diamond eye one.
not sure if it? A dimond eye or not... But i got it from ebay.... they listed 3in and 4in aswell
 
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Old Dec 17, 2011 | 06:43 PM
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Jpg96...That truck makes me like stacks. With that sticker and sittin low on the cab. I usually hate em. I seen a guy at work today with stacks so high i dont know how it fits under powerlines.
 
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Old Dec 17, 2011 | 06:51 PM
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From: Phill Mo
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Originally Posted by disco biscuit
Jpg96...That truck makes me like stacks. With that sticker and sittin low on the cab. I usually hate em. I seen a guy at work today with stacks so high i dont know how it fits under powerlines.
lol thanks man.... I no was the same way! I hate a big 8 or 10 in stack 6 foot tall! My stacks ar fully custom and i made them to fit my truck.... From the front you cant even tell i have them ... The top of the moter cut is flush with top of the cab i think it looks nice and clean
 
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