o2 sensors?

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04-09-2008, 08:04 PM

2004Lariat5.4

2004Lariat5.4 is offline

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o2 sensors?

i have 4 stock cats with an 02 sensor going to each one of them, if i replace my stocks with high flow cats, will my check engine light come on? what exactly do i do in this situation...... buy a couple of bypasses?

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