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01-23-2018, 10:05 AM
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#1 |
 
Drives: 2015 SS L99 Join Date: Aug 2009
Location: Sarasota FL
Posts: 67
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Bbk headers
I am. Thinking of doing BBK long tubes with the cats. My question is are those cats going to keep my CEL off or is it a waste? I’m trying to not tune it yet. I have a 2015 SS with Automatic tranny. Thanks for any info
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01-23-2018, 10:19 AM
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#2 |
 Drives: 2010 SS Join Date: Jun 2015
Location: Austin
Posts: 439
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A large portion of hi flow cats can still trigger an engine light.
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01-23-2018, 11:03 AM
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#3 |
 
Drives: 2011 2SS/RS Convertible Join Date: Jan 2017
Location: Naperville, IL
Posts: 256
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A good tuner can turn them off so you don't get any CEL's
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Richard Partlow
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01-24-2018, 08:11 AM
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#4 |
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Started#gottalovethatblue
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If you get long tube headers with or without cats you will eventually get a CEL. The reason for it is 2 fold: 1) You have relocated the O2 sensors further away from the engine so the front O2 sensor will read differently than the factory says it should; and 2) The flow between O2 #1 and O2 #2 is different than factory settings (greater) so that will trigger the CEL.
If you're not wanting to tune right away you can either drive around with a CEL which is fine for a while, but you don't really want to beat on the car too badly as it is not running optimally. However, especially with an automatic transmission you will not regret a properly done tune. The factory trans tunes on these cars is extremely lazy and once you get a quality tune you will experience a whole different animal or a car!
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