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11-27-2025, 04:25 PM
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#1 |
 Drives: 2018 ZL1 Join Date: Jun 2020
Location: Louisiana
Posts: 118
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check engine light with Catted headers?
If I use a catted header (ARH with G sport cats) will the system have enough heat to keep the rear sensors happy? or do Ineed to have the rears tuned out before i do the install?
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11-27-2025, 05:36 PM
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#2 |
  
Drives: 2017 2ss 6mt Join Date: Mar 2024
Location: dallas
Posts: 953
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To be safe just tune out the codes. If your cat efficiency is just barely above the pass threshold new, then in a couple months it will be just below it. So to be safe just tune it out and you won't have to deal with it. You will pass visual inspections and you won't have an engine light on.
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11-28-2025, 09:25 AM
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#3 |
         
Drives: 2016 1SS NFG A8 Join Date: Aug 2017
Location: 46804
Posts: 7,561
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I would tune them out for the reasons mentioned above.
__________________
 2016 NFG SS A8/Whipple 2.9/Fuel System/Flex Fuel |
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11-28-2025, 01:03 PM
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#4 |
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Drives: 2018 ZL1 Join Date: Jun 2020
Location: Louisiana
Posts: 118
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thanks!!!
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