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Go Back   M3Post - BMW M3 Forum > E90/E92 M3 Technical Topics > Engine, Transmission, Exhaust, Drivetrain, ECU Software Modifications
Steve Thomas BMW
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      07-21-2012, 01:13 PM   #1
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Drives: Camaro SS | e92 M3
Join Date: Jul 2011
Location: STL

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Deleted primary cats

How soon before I see a CEL? I haven't put 100 miles on it yet but I've driven it on an off for about a week and nothing. How long does it normally take for you guys to get a CEL? I have a tune coming in from EVOLVE that will take care of this but I was just curious.

Also, for those who haven't, deleting primary cats is a must. If you keep resonators and secondary cats the car will sound beautiful. I do have a Remus race exhaust on as well.

In my case, I decided to delete the resonators too and the sound went from "sport-tuned" to "race-aggressive." Probably not everyone's cup of tea but I don't daily drive.


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      07-21-2012, 08:57 PM   #2
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Drives: F82
Join Date: Nov 2011
Location: Broward

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Sooner or later it will come, a few more start cycles and she will light up

Grigio Telesto M4, 6MT.
E90 LCI 335i
6.2 Ford Raptor
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