04 Excursion 6.0 - cat or no cat? - Ford Powerstroke Diesel Forum
 
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post #1 of 5 Old 09-20-2008, 09:17 AM Thread Starter
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04 Excursion 6.0 - cat or no cat?

What's the story on the cat converter? If this is removed, will it improve mileage? I just got a Banks Six Gun Bundle installed, but the exhaust sounds pretty much the same.
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post #2 of 5 Old 09-20-2008, 12:08 PM
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taking it out will lower your egt's , and sounds meaner at wot

studs,egr delete(sinister),dieselsite coolant filter, nuc oil bypass, dj's fuel + regulated fuel return, sct by eric, 4in silverline no cat, isspro gauges, cat elc coolant, hids, lots of other odds and ends......
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post #3 of 5 Old 09-20-2008, 12:11 PM
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Originally Posted by scotty2280 View Post
taking it out will lower your egt's , and sounds meaner at wot
You might see a little MPG's but you motor will love you for the lower EGT's and you will love the wistle and nasty mean sound.

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post #4 of 5 Old 09-21-2008, 03:57 PM
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get rid of the cat and the muffler and let that sucker breathe

2004 Excursion
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post #5 of 5 Old 09-21-2008, 04:09 PM
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mileage is different on every vehicle, what works for you might not work for someone else, the cat off will help like others said for temperature reasons for sure , but a fuel mileage increase isnt gauranteed

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