Secondary cats deleted

***M4*** · 02-16-2017, 05:30 PM

Anyone passed CT emissions with a mid pipe that deletes the secondary cats?
Or do you think you have keep all 4 cats to be able to pass emissions?
Anyone have any experience with this?
Also did CT emissions do a visual inspection as well?
Thanks in Advance

mdemon · 02-17-2017, 06:18 AM

Quote:

Originally Posted by ***M4***

Anyone passed CT emissions with a mid pipe that deletes the secondary cats?
Or do you think you have keep all 4 cats to be able to pass emissions?
Anyone have any experience with this?
Also did CT emissions do a visual inspection as well?
Thanks in Advance

No for visual inspection! And you can always do the tune to delete CEL

krotondo · 02-17-2017, 03:35 PM

Quote:

Originally Posted by mdemon

No for visual inspection! And you can always do the tune to delete CEL

you will not get a CEL when using a mid pipe. O2 sensors are in downpipe

MrSmartyPants · 02-17-2017, 08:11 PM

Like krotondo said, no o2 sensor after the secondary cats. Should be no issue removing and passing in CT. Newer cars are OBD plug in check only.

02-16-2017, 05:30 PM	#1
*M4* First Lieutenant 81 Rep 321 Posts Drives: 17 M4 CompPack- 6 MT- yas blue Join Date: Sep 2016 Location: CT iTrader: (3)	Secondary cats deleted Anyone passed CT emissions with a mid pipe that deletes the secondary cats? Or do you think you have keep all 4 cats to be able to pass emissions? Anyone have any experience with this? Also did CT emissions do a visual inspection as well? Thanks in Advance __________________ 17 M4 -Yas Blue-Black Full Int-ZCP-ZDB-ZEC-ZLP-6 Speed MT
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02-17-2017, 08:11 PM	#4
MrSmartyPants Lieutenant 354 Rep 499 Posts Drives: F80 M3 - 6MT_MW on SO Join Date: Dec 2016 Location: CT iTrader: (1)	Like krotondo said, no o2 sensor after the secondary cats. Should be no issue removing and passing in CT. Newer cars are OBD plug in check only.
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