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2004 - 2008 Ford F150 General discussion on the 2004 - 2008 Ford F150 truck.

Looking to install aftermarket muffler... any ideas?

Old 01-18-2011, 10:05 PM
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dont worry about backpressure

if you want optimal hp/tq and dont plan on a turbo or supercharger get 2.25" piping, mid/top end get 2.5"
Old 01-18-2011, 10:06 PM
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AusFX4 is right on with those parts. Mufflers can change depending on your taste. Keep the pipe 2.25" or 2.5" to maintain scavenging. I'm in the process of writing a back pressure myth thesis so stay tuned.
Old 01-18-2011, 10:09 PM
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Thanks guys for the help
Old 01-18-2011, 10:16 PM
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That's what were here for

Better than search this search that feedback

Make that article a sticky
Old 01-19-2011, 09:53 PM
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Flowmasters 40 series is the way to go! I have a true dual set up on mine and it sounds eargasmic!


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