Downstream location is between the catalytic converter and the tailpipe. 2004-2006 Infiniti FX35 V6-3.5L ; From 10/03. 2006 Infiniti M35 V6-3.5L. 2004 Infiniti G35 V6-3.5L ; AWD. 2005-2006 Infiniti G35 V6-3.5L.
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