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Old 06-03-2013, 11:35 AM   #1

Nighthawk89's Avatar
Drives: 2011 Camaro 2Ss M6
Join Date: Dec 2011
Location: Southern California
Posts: 3,486
Catless LT's And no CEL?

I am about to order some Kooks high flow cats as i am taking it in to get it smoked this week to register it out here in CA. The question is, why didnt i throw a CEL without CATS and will i when i put on the HF's.. Hoping i dont run into any problems when i go to smog it. It isn't tuned..
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Old 06-03-2013, 12:53 PM   #2
RJT-SS's Avatar
Drives: '11 2SS/RS A6
Join Date: Apr 2011
Location: New Orleans
Posts: 504
It is not predictable when you will throw CEL, with or without cats; each car is different due to the sensitivity of the O2 sensors. It is a bit strange that you haven't had one without cats. You may install the cats and get a CEL right away.....and maybe not.

If you are getting Kooks cats, you must have LTs? To my knowledge, Kooks does not make HF cats for stock manifolds. If you want to make sure you don't throw a CEL for your smog test, get Kooks green cats....very expensive though.
Performance Mods:
Kooks 1-7/8 LTs; Calico coated w/HFCs, Solo Mach XL catback w/J-pipes, VMax TB, C.A.I. Intake, JRE Tune, RX Catch-Can
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