EGT difference between cat and muffler delete and 4inch turbo back exhaust??? - Ford Powerstroke Diesel Forum
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post #1 of 4 Old 11-29-2010, 03:38 AM Thread Starter
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Exclamation EGT difference between cat and muffler delete and 4inch turbo back exhaust???

Has anyone noticed any difference in egt's after a muff and cat delete? And if you did the delete then did a 4 inch exhaust, what was the difference in egts between the two? Thanks!

2005 F-250 XL 180k miles mods coming soon:
Gearhead SRL with SCT x2, exhaust.Then my 2010 Alpine 3500re Fifth wheel. And then my 98 Mustang gt 1 owner 35k miles fully modified, supercharged, methanol, cams etc. And My 2000 Excursion V-10 4x4
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post #2 of 4 Old 11-29-2010, 04:47 AM
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I haven't, but probably not much. I think it comes with a 4" DP to begin with. Then 3.5" the rest of the way.



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post #3 of 4 Old 11-29-2010, 07:26 AM
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trucks under 450 hp, not much for egt difference. There is a sound difference. The biggest is price difference.

A 4" turbo back, the DP tubing will get surrounding components hotter than the stock system.


I chose to get the delete pipes because I can easily put my cat back, price, and for the large drop in EGT's.
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post #4 of 4 Old 11-29-2010, 07:40 AM
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Did this exact swap in march.

You will not notice any difference in EGTs going from stock with a muffler and cat delete to a 4 inch exhaust on an 05 up truck. They come with a 3.5 inch downpipe stock. Same as most aftermarket exhausts

You will notice a sound difference thats it.

Now in 03-04 trucks you will notice a minor difference. The factory downpipe is bent better on the newer trucks

Email: Dave@powerstroke.org
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