2004 - 2008 F150 2004, 2005, 2006, 2007 and 2008 Ford F150's with 5.4 V8, 4.6 V8 engine

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Exhaust question

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Old

Sep 22, 2004 | 06:03 PM

#1

98Cobra

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Joined: Jan 2004

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Exhaust question

I want to put a cat back system on my truck (FX4 SCREW 5.4) but I plan on getting the Whipple supercharger in about a year. Will a cat back system need to be repllaced when the charger is installed because of the increased HP? I believe the cat back systems are generally 3 inch. Will I need like 4 inch or more with the charger?
Thanks in advance for any ideas!

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Old

Sep 22, 2004 | 06:14 PM

#2

southernfordman

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3 inch will do but maybe a 3 1/2 inch pipe, but i would get new headers

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Old

Sep 22, 2004 | 09:06 PM

#3

SierraClubS

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Joined: Feb 2004

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From: iowa

3.5s would look better... i like the magnaflows and banks exhaust systems for the 5.4... just my 2 cents

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