[saudisinaudis]

Will CEL appear in G80s like they did with my G26 M440i or is this not a problem? And in case of CEL appearing, how to remove w/o tune? (Cant afford the Femto unlock hassle)

[G82 Jesse]

Shoutout to "Unlockable Character" on youtube for this video right here (timestamp discussing catless down pipes included, 16:11 minute marker)

It appears he uses an O2 spacer on the oxygen bungs to trick the DME into believing the car is emissions compliant without displaying a CEL. Without unlocking your DME via Femto it's likely there's no way to permanently disable the oxygen CEL. This appears to be the link to the product he's discussing, I think: http://www.bigdaddiesgarage.com/mini-cat-cel-fix.html

I've heard of people using O2 bung extenders before with mixed results on a slew of different vehicles. Sometimes it clears the CEL for only 2,000mi, sometimes it doesn't work at all, sometimes it keeps the code away permanently. Your mileage may vary.

[viciousmo]

I have a catless dp with bigdaddy mini cats for 1k miles hard driving, no CEL. Not to say it will happen in the future. The plan is to tune very soon.

[brianray18]

AA DP solved my sell problems. Pricey but worked

[rick504]

I have big daddies mini cats too. Never had an issue

[christianb5s4]

I wonder how the AA flows and makes power versus stock and something with 200cell cats?

[mike@x-ph.com]

Originally Posted by christianb5s4

I wonder how the AA flows and makes power versus stock and something with 200cell cats?

GESI cats used in AA downpipes are higher flow than stock, rated at 850 whp

[BmwFanBoy94]

Very easy.

Get Can Mil module by either awron or LEIB.

[flexbrah]

Big daddies mini cats were installed with my DP and im currently ~600 miles in with no CEL. Fingers crossed

[Info@mad-us.com]

Originally Posted by christianb5s4

I wonder how the AA flows and makes power versus stock and something with 200cell cats?

A 200 cell will flow much better than stock or the Gesi and will be the closest you can get to a full catless setup.


Someone was testing our 200 cell without a spacer I believe he had 3 weeks on it with no cel.

[Not_Speeding]

Originally Posted by flexbrah

Big daddies mini cats were installed with my DP and im currently ~600 miles in with no CEL. Fingers crossed

Will you pass inspection with this setup?

[evidence]

Originally Posted by Info@mad-us.com

Someone was testing our 200 cell without a spacer I believe he had 3 weeks on it with no cel.

Might be referring to me. I'm at a month and half of no CEL with the rear o2 sensors direct mounted to a MAD 200 cell catted.

I got the slow lean/rich response CELs w a spacer and the BDG minicats, never saw cat efficiency CELs in any setup.

For catless it seems like BDG minicats are your best chance of avoiding a CEL, some people say it pops up now and again. Unless you're going big turbo or enjoy the smell of fuel, 200 cell is a great choice over catless.

[evidence]

Originally Posted by Not_Speeding

Will you pass inspection with this setup?

On newer vehicles they're just testing the ODBII port everywhere I'm aware of. As long as you don't have any 'not ready' codes or a CEL, you're a pass. 'not ready' happens after you reset the ECU and you haven't driven enough miles to have everything in a ready/calibrated state, can't use that method to avoid the CEL and pass lol.

[Info@mad-us.com]

Originally Posted by evidence

Might be referring to me. I'm at a month and half of no CEL with the rear o2 sensors direct mounted to a MAD 200 cell catted.

I got the slow lean/rich response CELs w a spacer and the BDG minicats, never saw cat efficiency CELs in any setup.

For catless it seems like BDG minicats are your best chance of avoiding a CEL, some people say it pops up now and again. Unless you're going big turbo or enjoy the smell of fuel, 200 cell is a great choice over catless.

Yes I was referring to you. I couldn't find that post you made originally .


You are in a stock tune correct? If so this is excellent news !

[evidence]

Originally Posted by Info@mad-us.com

You are in a stock tune correct? If so this is excellent news !

I'm tuned now, but I have not disabled the cat efficiency codes in bm3.

[Info@mad-us.com]

Originally Posted by evidence

I'm tuned now, but I have not disabled the cat efficiency codes in bm3.

[G80 PR]

Originally Posted by Info@mad-us.com

A 200 cell will flow much better than stock or the Gesi and will be the closest you can get to a full catless setup.


Someone was testing our 200 cell without a spacer I believe he had 3 weeks on it with no cel.

Hello

Any Dyno compare on a Catless vs 200 cell vs stock DOWNPIPES?

[S58King]

I drove 2 years with catless dps paired with big daddies mini o2 cats, recommend it highly

[DieselG80XC]

Have a brand new set of BD spacers FS ended up not needing them pm me

[BadBoostedBMWM3]

Originally Posted by BmwFanBoy94

Very easy.

Get Can Mil module by either awron or LEIB.

Do you have a link to those products? I have heard about LEIB. The install looks very tedious.