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Old 05-13-2016, 05:18 PM   #1
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o2 sensor ? for cat delete

What happens to the rear O2 sensors if you delete the secondary cats? Do you just unplug them or do the bypass pipes have a spot to install them?
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Old 05-13-2016, 06:25 PM   #2
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If you are on a 2000-2004 the rear O2 sensors are after the primary cat integrated into the manifold and before the secondary cats, so you don't need to do anything since the mid pipes are after the o2 sensors.
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Old 05-13-2016, 06:26 PM   #3
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Some pipes have provisions for the O2 sensors. My 04 only had O2 sensors after the primary cats, so there were no worries. What year & engine do you have?
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