do these cats look gutted ?

anorphirith · 02-26-2018, 01:31 PM

Do these cats looks gutted ?
the welds on the right one look funny

also who makes those ?

thanks !

Jressman · 02-26-2018, 03:36 PM

They look shiny. Looks like something aftermarket to me.

DS3IAM · 02-26-2018, 03:41 PM

second picture looks like after market resonators with some black sharpie art work for the M symbol .. as for the first picture I can't tell.

fordbaxter · 02-27-2018, 11:53 AM

Quote:

Originally Posted by anorphirith

Do these cats looks gutted ?
the welds on the right one look funny

also who makes those ?

thanks !

The second picture shows aftermarket resonators in place of the secondary cats. This is a common mod and nothing to worry about.

The first picture looks normal to me, I doubt someone went through the trouble to mess with the stock downpipes. I did notice the hardware isn't stock though. Looks like someone removed the downpipes and didn't use the OEM nuts so they might have installed catless downpipes or took them off for maintenance.

feuer · 02-27-2018, 12:02 PM

Quote:

Originally Posted by anorphirith

Do these cats looks gutted ?
the welds on the right one look funny

Quote:

Originally Posted by fordbaxter

The second picture shows aftermarket resonators in place of the secondary cats. This is a common mod and nothing to worry about.

The first picture looks normal to me, I doubt someone went through the trouble to mess with the stock downpipes. I did notice the hardware isn't stock though. Looks like someone removed the downpipes and didn't use the OEM nuts so they might have installed catless downpipes or took them off for maintenance.

They could be gutted but to find out they need to be removed. Or at least drop the exhaust part and peek into the DP's. Is easy to gut them. No cutting and welding required. Seems like the oil pan and rear main seal are in good order. So that's good.

anorphirith · 02-27-2018, 12:45 PM

Quote:

Originally Posted by feuer

They could be gutted but to find out they need to be removed. Or at least drop the exhaust part and peek into the DP's. Is easy to gut them. No cutting and welding required. Seems like the oil pan and rear main seal are in good order. So that's good.

thanks everyone, I drop the exhaust to check it out. I'm having trouble with the catalytic monitor not clearing, that might have to do with it.

feuer · 02-27-2018, 12:50 PM

Quote:

Originally Posted by anorphirith

thanks everyone, I drop the exhaust to check it out. I'm having trouble with the catalytic monitor not clearing, that might have to do with it.

It could be the o2 sensors.

techwhiz · 02-27-2018, 02:21 PM

Quote:

Originally Posted by anorphirith

thanks everyone, I drop the exhaust to check it out. I'm having trouble with the catalytic monitor not clearing, that might have to do with it.

I could be mistaken but those look to be secondary cats.
They have no effect on O2 readiness.
They are behind the second set of O2 sensors.
If you are having issues with the O2 sensors being ready, make sure they are good.

If you have more than 100K miles and are having issues with readiness, they might be bad.

I had O2 sensors go before 100K miles and most recently replaced all mine about two years ago.

anorphirith · 02-27-2018, 02:42 PM

Quote:

Originally Posted by techwhiz

I could be mistaken but those look to be secondary cats.
They have no effect on O2 readiness.
They are behind the second set of O2 sensors.
If you are having issues with the O2 sensors being ready, make sure they are good.

If you have more than 100K miles and are having issues with readiness, they might be bad.

I had O2 sensors go before 100K miles and most recently replaced all mine about two years ago.

which O2 sensors do I need ?

here's a part list
http://www.realoem.com/bmw/enUS/show...diagId=18_0686
(is it 1 & 2 or 4 & 5 ?)

is this the correct aftermarket part number ?
NTK25676

thanks!!

anorphirith · 03-02-2018, 01:00 PM

so apparently this is the unspoken solution
http://www.e90post.com/forums/showpo...2&postcount=23

http://www.vr-speed.com/vrsf-catless...-bmw-335i.html

fordbaxter · 03-02-2018, 01:51 PM

Not sure if this is what you're looking for but when I replaced my O2 sensors I used this post: http://www.e90post.com/forums/showthread.php?t=726481

King Rudi · 03-02-2018, 03:07 PM

Maybe there is something wrong with me but I was slightly disappointed to find no gutted cats in this thread.

anorphirith · 03-02-2018, 03:57 PM

Quote:

Originally Posted by fordbaxter

Not sure if this is what you're looking for but when I replaced my O2 sensors I used this post: http://www.e90post.com/forums/showthread.php?t=726481

awesome thanks

GATORB8 · 03-02-2018, 04:43 PM

Mixing up the signals in the post cat O2s can cause codes as well (either installing the O2 in the opposite pipe or mixing up the connectors).

anorphirith · 03-02-2018, 05:14 PM

Quote:

Originally Posted by GATORB8

Mixing up the signals in the post cat O2s can cause codes as well (either installing the O2 in the opposite pipe or mixing up the connectors).

I don't have any codes, just the monitor not clearing

GATORB8 · 03-02-2018, 05:27 PM

Quote:

Originally Posted by anorphirith

I don't have any codes, just the monitor not clearing

Are you sure the software is stock?

anorphirith · 03-03-2018, 01:54 PM

Quote:

Originally Posted by GATORB8

Are you sure the software is stock?

no idea. how can I check ?

I did try unplugging an O2 sensor. it threw a code right away

fordbaxter · 03-03-2018, 10:04 PM

Quote:

Originally Posted by anorphirith

no idea. how can I check ?

I did try unplugging an O2 sensor. it threw a code right away

If you have the MHD app/cable you can check what flash the car is running. You might also be able to check with INPA but I don't have experience with that side of it

anorphirith · 03-03-2018, 11:09 PM

would it only work with MHD flashes or does it detect anyone of them? the car wasn't driven for 3y +

fordbaxter · 03-03-2018, 11:21 PM

Quote:

Originally Posted by anorphirith

would it only work with MHD flashes or does it detect anyone of them? the car wasn't driven for 3y +

I'm not 100% sure on this but it tells you the name of the flashed file so if it's not stock it should be somewhat obvious. Or pull logs and look at the boost to see if it's stock

anorphirith · 03-04-2018, 12:00 AM

Quote:

Originally Posted by fordbaxter

I'm not 100% sure on this but it tells you the name of the flashed file so if it's not stock it should be somewhat obvious. Or pull logs and look at the boost to see if it's stock

awesome thanks for your help

anorphirith · 03-05-2018, 08:40 PM

Quote:

Originally Posted by fordbaxter

I'm not 100% sure on this but it tells you the name of the flashed file so if it's not stock it should be somewhat obvious. Or pull logs and look at the boost to see if it's stock

hi! I got the cable and the mhd flasher module. where can i see the name of the flashed file? thanks

edit I"m pretty sure it's stock based on this:

02-26-2018, 01:31 PM	#1
anorphirith Private 23 Rep 78 Posts Drives: 07' 335i 6mt Cpe Join Date: Jul 2013 Location: Bay Area iTrader: (0)	do these cats look gutted ? Do these cats looks gutted ? the welds on the right one look funny also who makes those ? thanks !
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02-26-2018, 03:36 PM	#2
Jressman Registered 1 Rep 3 Posts Drives: 2007 BMW e92 335i 6MT Join Date: Feb 2018 Location: Boston, Massachusetts iTrader: (0)	They look shiny. Looks like something aftermarket to me.
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02-26-2018, 03:41 PM	#3
DS3IAM Lieutenant 201 Rep 552 Posts Drives: E90 335 XI Join Date: Jun 2016 Location: NJ iTrader: (7)	second picture looks like after market resonators with some black sharpie art work for the M symbol .. as for the first picture I can't tell. __________________ 2009 335i xDrive 6MT // Black Sapphire / Cold Weather / M Sport / PDC / Premium Package / Aerodynamic Kit / Anthracite headliner / Keyless Entry / AR Design Catless Downpipe / Style 313 19" Wheels/ OEM Euro Taillights / LUX H8 160
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03-02-2018, 01:00 PM	#10
anorphirith Private 23 Rep 78 Posts Drives: 07' 335i 6mt Cpe Join Date: Jul 2013 Location: Bay Area iTrader: (0)	so apparently this is the unspoken solution http://www.e90post.com/forums/showpo...2&postcount=23 http://www.vr-speed.com/vrsf-catless...-bmw-335i.html
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03-02-2018, 01:51 PM	#11
fordbaxter N54 Whisperer 20 Rep 71 Posts Drives: RB Turbo E92 335i Join Date: Dec 2015 Location: Raleigh NC iTrader: (0)	Not sure if this is what you're looking for but when I replaced my O2 sensors I used this post: http://www.e90post.com/forums/showthread.php?t=726481
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03-02-2018, 03:07 PM	#12
King Rudi Lieutenant Colonel 13159 Rep 1,965 Posts Drives: Meat Suit Join Date: Sep 2017 Location: Planet Earth iTrader: (0)	Maybe there is something wrong with me but I was slightly disappointed to find no gutted cats in this thread.
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03-02-2018, 04:43 PM	#14
GATORB8 Captain 225 Rep 807 Posts Drives: 2011 335is 6MT Join Date: Jan 2016 Location: Chicago iTrader: (0) Garage List 2011 BMW 335is [9.50]	Mixing up the signals in the post cat O2s can cause codes as well (either installing the O2 in the opposite pipe or mixing up the connectors).
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03-03-2018, 11:09 PM	#19
anorphirith Private 23 Rep 78 Posts Drives: 07' 335i 6mt Cpe Join Date: Jul 2013 Location: Bay Area iTrader: (0)	would it only work with MHD flashes or does it detect anyone of them? the car wasn't driven for 3y +
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