4.6L (1996-2004 Modular) Mustang Technical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within.

o2 ext

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Old May 26, 2009 | 12:43 PM
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punisher03
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Joined: Feb 2009
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From: florida
Default o2 ext

do i need the o2 ext on my headers or if i got a tune can they programe them out
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