Break out the Cats

robotfixr · 03-27-2019, 09:19 AM

I have searched and haven't seen a sure answer so I am asking.

If I open up my cats with downpipes where can I find a simple tune to ignore the O2 errors?

Just want the sound as the M5 has plenty of power for me.

Thanks for any help in advance

dsmclark · 03-27-2019, 03:01 PM

best bet is bm3 for that. Can run the competition pack tune or just keep it stock but switch off the cold start and cel.

AWF10M5 · 03-28-2019, 10:53 AM

Quote:

Originally Posted by dsmclark

best bet is bm3 for that. Can run the competition pack tune or just keep it stock but switch off the cold start and cel.

really you can run the competiton tune ? can u pass inspection too

rgb129 · 03-28-2019, 12:02 PM

Quote:

Originally Posted by AWF10M5

really you can run the competiton tune ? can u pass inspection too

With the CEL code delete/suppression you will pass inspection in places that just check from the ODBII interface and don't do tailpipe reads. Competition tune will have no impact on whether or not you pass inspection.

Chiraq M5 · 03-29-2019, 04:10 PM

BM3 can do it.

As for emission test each state is different, in IL there's no way you can pass without cats.

03-27-2019, 09:19 AM	#1
robotfixr New Member 4 Rep 16 Posts Drives: 2015 M5 Join Date: Aug 2018 Location: Cincinnati iTrader: (0)	Break out the Cats I have searched and haven't seen a sure answer so I am asking. If I open up my cats with downpipes where can I find a simple tune to ignore the O2 errors? Just want the sound as the M5 has plenty of power for me. Thanks for any help in advance
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03-27-2019, 03:01 PM	#2
dsmclark Second Lieutenant 81 Rep 224 Posts Drives: Cayman GT4 Clubsport Join Date: Aug 2017 Location: UK iTrader: (0)	best bet is bm3 for that. Can run the competition pack tune or just keep it stock but switch off the cold start and cel.
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03-29-2019, 04:10 PM	#5
Chiraq M5 Private First Class 28 Rep 123 Posts Drives: 2015 M5 CP Join Date: Feb 2019 Location: Chicago iTrader: (0)	BM3 can do it. As for emission test each state is different, in IL there's no way you can pass without cats.
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