Boostjunkie Posted December 23, 2004 Share Posted December 23, 2004 I think it is actually right in front of the third cat, but I'm sure there is another further upstream as well. All OBDII cars run one close to the exhaust ports for feedback control and another downstream of the cats to monitor catalyst operation. Link to comment Share on other sites More sharing options...
rao Posted December 23, 2004 Share Posted December 23, 2004 The second 02 sensor is right in front of the third cat. The first O2 sensor is in the exhaust manifold just before the uppipe. Rob IF YOU CARE ABOUT YOUR CAR YOU SHOULD NEVER DRIVE IT Link to comment Share on other sites More sharing options...
illt3ck Posted March 22, 2005 Share Posted March 22, 2005 $149.95 - Daddy SCP t304 SS Up-pipe http://www.daddysscp.com/dcart4/product.php?productid=53&cat=0&page=1 Link to comment Share on other sites More sharing options...
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