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From 10-12 MPG to 15-16 MPG mixed driving!

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Old 04-08-2010, 04:38 PM
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im pretty sure ford carries a extended warranty on the cats.... they didnt mention this at all?
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Old 04-08-2010, 04:40 PM
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I mentioned it. It's 8 years, 80,000 miles. My truck is 100k + in mileage.
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Old 04-08-2010, 04:53 PM
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What year and motor are we talking about here ?
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Old 04-08-2010, 04:57 PM
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2004 5.4
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Old 04-08-2010, 05:34 PM
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i wonder if removing the 2 secondary cats will make my flow master 40 sounds better and louder.
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Old 04-08-2010, 06:47 PM
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Which trucks have the four cat system? It seems some have it and some dont, I have two (one each side). Is there any performance difference between the two set ups? Just wondering out loud....
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Old 04-08-2010, 06:49 PM
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I like this thread. Plenty of mustang talk, lol.
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Old 04-08-2010, 07:57 PM
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nineinch, are you on mustangforums.com?

and nashtruck im pretty sure there would be more restriction with 4 cats so my guess is the 2 cat systems are better for performance
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Old 04-08-2010, 08:05 PM
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4 cat systems were usually the 04 5.4's if i remember correctly
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Old 04-08-2010, 08:07 PM
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ya, mines 2 cats
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