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1994.5 - 1997 7.3L Power Stroke Diesel  

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Old Jul 4, 2011 | 01:48 PM
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Quick question..

What is the diameter of the stock exhaust downpipe and tube for a '96 7.3?
 
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Old Jul 4, 2011 | 01:52 PM
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That would be hard to say, seeing that it isn't round... It is a flat pancake type pipe that doesn't flow worth a hoot, I'll see if I can dig up a picture.
 
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Old Jul 4, 2011 | 02:00 PM
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Originally Posted by plgebbia
That would be hard to say, seeing that it isn't round... It is a flat pancake type pipe that doesn't flow worth a hoot, I'll see if I can dig up a picture.
Doh!

Much appreciated...

Reason being is I have a muffler that a guy with a 96 7.3 wants to buy and him and I were talking about just doing the whole exhaust system but he didnt know what was in there already (stock)

Come to think, he did say he put a 3" down pipe in. Does that sound right for the exhaust system he would have stock?

Also, he asked about something just before the muffler on the exhaust. I guessed it was a resonator. Is that correct?
 
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Old Jul 4, 2011 | 02:09 PM
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Its a cat. Do the whole exhaust. Check the dpwnpipe that it is 3" all the way
 
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Old Jul 4, 2011 | 02:10 PM
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Here:

You cansee it a little near the firewall.

The thing in front of the muffler is a catalytic converter, all OBS trucks had them, while most SD trucks don't. Most guys gut them or delete them, same difference A 3" DP is what most guys run. It is also all that you can fit without a body lift, or some other firewall modification.
 
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Old Jul 4, 2011 | 02:13 PM
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Originally Posted by plgebbia
Here:

You cansee it a little near the firewall.

The thing in front of the muffler is a catalytic converter, all OBS trucks had them, while most SD trucks don't. Most guys gut them or delete them, same difference A 3" DP is what most guys run. It is also all that you can fit without a body lift, or some other firewall modification.
Interesting. I didnt think the older trucks had a Cat. Hmm.. Good to know about the dp too. Thanks!
 
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Old Jul 4, 2011 | 02:13 PM
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iirc i wanna say the stock system...after downpipe, was 3.5 inches....
 
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Old Jul 4, 2011 | 02:14 PM
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Originally Posted by bryanlindborg600
iirc i wanna say the stock system...after downpipe, was 3.5 inches....
My guess was 3.25" idk why but that sounded right to me
 
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Old Jul 4, 2011 | 02:19 PM
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3.5" on the stock system from the cat back.

And yes, all 94-97 Stroker's had cats. Just a few of the SD's have them.
 
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Old Jul 4, 2011 | 07:27 PM
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Talking

Originally Posted by plgebbia
3.5" on the stock system from the cat back.

And yes, all 94-97 Stroker's had cats. Just a few of the SD's have them.
X2 on that. And the aftermarket DP could be 3" all the way, or 3 to 3 1/2" or 3 to 4".

I add a pic of a stock DP and one of 3 to 3.5" with one of 3 to 4"

 
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Old Jul 4, 2011 | 08:00 PM
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Wink

And here is one of the stock and the 3 to 3"
 
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