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Old November 15th, 2008, 09:58 AM   #1
dodson
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Default 2003 F-150 fx4

i have a 03 f-150 with the 5.4. i have dual exhaust with no mufflers. i want it to be louder but a good sound would it be smart to cut off the cats?
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Old November 17th, 2008, 01:39 PM   #2
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Dont cut off the cats, your computer will go nutso and mess up any fuel economy you have. Get an after market exhaust with 3 1/2 diameter tubes and you should be pleased.
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Old November 17th, 2008, 01:46 PM   #3
Fullsize4life
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Put some 4in tips on the end of your pips. Mine was like that and it was way loud. I used 4in slash cut stainless when i did mine.
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Old November 17th, 2008, 03:12 PM   #4
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same here i had 5 inch tips and it was louder than a buddy's with 2.5 tips
its strange but it's true
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Old November 18th, 2008, 05:45 AM   #5
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what kind of muffler would sound good
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Old November 18th, 2008, 11:08 AM   #6
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keep cats, and straight pipe rest of way. I have this on my 2004 5,4L F150 and I love it. I what kind of muffler do you have now?
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Old November 18th, 2008, 01:04 PM   #7
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Quote:
Originally Posted by dodson View Post
i have a 03 f-150 with the 5.4. i have dual exhaust with no mufflers. i want it to be louder but a good sound would it be smart to cut off the cats?
Not if you plan on moving to California
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Old November 18th, 2008, 10:43 PM   #8
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i dont have mufflers
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