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Old 05-04-2016, 09:53 AM   #1
KaBoom1701
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Headers and cats + O2 sensors...

So I bought this set from another member...


http://www.camaro5.com/forums/showthread.php?t=429903


When I removed the OEM cats and exhust manIifolds I noticed 4 O2 sensors...

Only see 2 connectors on the aftermarket stuff...what am I missing?
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Old 05-04-2016, 10:24 AM   #2
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The rear two will get tuned out, so are not necessary. Most just zip tie the wires up to the frame.
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Old 05-04-2016, 11:25 AM   #3
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Quote:
Originally Posted by pheonix75 View Post
The rear two will get tuned out, so are not necessary. Most just zip tie the wires up to the frame.
This. I didn't zip tie anything I actually used the rear bung for a wideband sensor and just plugged off the passenger side rear bung (not sure if yours has the rear bungs or not) but even if it doesn't it really doesn't matter anyway, your car will throw a code for the rear o2 sensors whether they are installed or not.

Basically, don't use the rear o2 sensors at all and go get a tune after install.
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Old 05-04-2016, 03:57 PM   #4
KaBoom1701
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Ok, Thx guys.

I started to freak out. Lol
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Old 05-05-2016, 10:51 AM   #5
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All depends on state vehicle inspections too.
For my 2001 z28, i have the rear o2 sensors installed after the cats, even though they are tuned out. Have to pass the visual during a state inspection, which requires pre and post cat o2 sensors.

Tony
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