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Old Jan 28, 2010 | 09:01 PM
  #1  
Dave Sponaugle's Avatar
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Downpipe question

What size downpipe fit in a 97 F350 without modding the firewall?

Who's down pipe do you recommend for the best fit?

All new to Power Strokes, and that looks like a good first mod to me.
 
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Old Jan 28, 2010 | 09:10 PM
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3in. is all you can do with out major modding of the firewall.With all DP you will have to do some modding to the fire wall i've got an MBRP
 
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Old Jan 28, 2010 | 09:44 PM
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I was actually wondering the same thing myself. I really don't want to have to beat the crap out of the firewall.

Red
 
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Old Jan 28, 2010 | 09:51 PM
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Originally Posted by fordpride
3in. is all you can do with out major modding of the firewall.With all DP you will have to do some modding to the fire wall i've got an MBRP
X2 on that Just gotta flatten the pinch weld i have a diamond eye 3 inch DP
 
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Old Jan 28, 2010 | 09:54 PM
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So that's pretty simple to do then? I don't really want to do complicated.

Red
 
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Old Jan 28, 2010 | 09:56 PM
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ALL YOU HAVE TO DO IS CUT THE SEEM ON THE BOTTOM OF THE FIREWALL ON EACH SIDE OF THE OF THE DP AND BEND IT
 
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Old Jan 28, 2010 | 10:16 PM
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Its that simple no joke!!!
 
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Old Jan 28, 2010 | 10:26 PM
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Might want to seal the bare metal with some high temp paint to prevent rust. The Diamond Eye is what I got. Extremely reasonable on ebay. If your looking for a downpipe only get ahold of Dale Isley at Tymar.
 
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Old Jan 29, 2010 | 02:06 AM
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I go the Diamond Eye as well. I'm happy with it.
 
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Old Jan 29, 2010 | 05:51 AM
  #10  
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I see no price on the Diamond Eye pipe, MBRP looks like the same pipe for 86 dollars and change.

I did look at Banks and Hypermax, they both were over 140 dollars and again looked like the same pipe.

Can the firewall insulation stay there, or does part of that have to go as well?
 
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Old Jan 29, 2010 | 07:33 AM
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Is it harder with an auto with the dipstick? I think I heard something about having to bend the dipstick tube.

Red
 
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Old Jan 29, 2010 | 08:27 AM
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I got the tymar 3-4 inch 2 piece one. It's one piece now since I welded up all the exhaust a few days ago. It took very little bending of the firewall to fit it but all trucks are different.
I forget the brand of the 4 inch system he sold me but it was all well worth the money.
 
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Old Jan 29, 2010 | 11:27 AM
  #13  
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Originally Posted by Red97350
Is it harder with an auto with the dipstick? I think I heard something about having to bend the dipstick tube.

Red
No bending of the dipstick tube my tuck is an auto as well.
 
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Old Jan 29, 2010 | 05:46 PM
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Originally Posted by rodneywar
No bending of the dipstick tube my tuck is an auto as well.
x2 mine's a auto for know
 
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Old Jan 29, 2010 | 06:03 PM
  #15  
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You can download the instructions from the Banks website. It's for the whole package but the exhaust instructions are in there. Gives you a good idea what is involved I should have stated I have the complete Diamond Eye exhaust system.
 
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