3rd gen Engine/Drivetrain Engine/Drivetrain Modification Discussions for 1999-2003 Models Only (BJ chassis)

Long header and O2 sensor

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Old June-9th-2002, 09:34 AM
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Long header and O2 sensor

My friend is trying to make me a long 4-1 header. Header is almost ready but i have one question, where should be the O2 sensor? In one pipe or where all 4 joins? How are all the other long headers built like HP racing ???

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Old June-9th-2002, 12:57 PM
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I would think you would want it in the collector.....many of the other headers I have seen DON'T have the sensor connection....they are for race applications and they couldn't care less about a check engine light comming on.
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Old June-9th-2002, 05:33 PM
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Put the O2 sensor in the collector about 3-4 inches from the flange where the header connects to the rest of the exhaust.
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