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Old 06-25-2018, 09:32 AM   #1
NarcNarwal
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Quick Question: O2 Sensor on Catless Downpipe

I just purchased a Beluga Racing Downpipe for my CCTA engine. Iím reading through on installations of DPís and have been a bit confused on O2 sensors. My father whoís worked on cars all his life, but never modified, was concerned about the O2 sensors getting burned. Is that a valid concern?

Also, Iím going to be tuning with Stratified in a month or two, will that eliminate the CEL post DP install?

And finally if i put the O2 sensors straight into the DP will that effect any fuel to air ratio and cause it to run lean? I had read about it a little but without a full explanation i was lost.

Thank you all in advance!
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Old 06-25-2018, 09:35 AM   #2
smanierre
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Originally Posted by NarcNarwal View Post
I just purchased a Beluga Racing Downpipe for my CCTA engine. Iím reading through on installations of DPís and have been a bit confused on O2 sensors. My father whoís worked on cars all his life, but never modified, was concerned about the O2 sensors getting burned. Is that a valid concern?

Also, Iím going to be tuning with Stratified in a month or two, will that eliminate the CEL post DP install?

And finally if i put the O2 sensors straight into the DP will that effect any fuel to air ratio and cause it to run lean? I had read about it a little but without a full explanation i was lost.

Thank you all in advance!
I have a catless dp and even on the stock exhaust the first o2 sensor is before the cat. With the rear one you may need a spacer to avoid a code but not having one won't hurt anything.

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Old 06-25-2018, 10:36 AM   #3
nagokart
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Been running catless for over a year now and also tuned with Stratified. No issues and no CEL.
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Old 06-25-2018, 10:49 AM   #4
lilonespaz
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Catless beluga exhaust also.

Not sure if it is burned but i rode around with the CEL (due to being catless and the readings super high) ,so the CEL was for the cat efficiency, with no drive-ability issues at all For awhile before i got the stratified tune. Have been CEL free since the tune.
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just like god intended. he didnt kill off the dinosaurs for their sweet sweet bone juice to have it go getting wasted by eco-obsessed torque thieves.
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