Catted Downpipe, Smell + Volume?

Topaz_M4 · 01-23-2019, 04:02 PM

I currently have a MPE with a catless downpipe, and i love the sound. But once i added the MPE, the smell of the catless got too strong. So I have two questions.

1) Does a catted DP, (Like ER's 200 CEL) smell? Im ok with a little smell, as long as its nothing crazy.

2) Does it make a difference in sound? Obviously it wont be as loud as my catless, which is ok for me. But for people who have it installed, did you notice a difference in sound?

Also, what catted downpipes do you guys recommend,
Thanks!!

Eschmacher · 01-23-2019, 04:10 PM

I just went from stock downpipe to catted vrsf:

1) you get a little smell, not too noticeable

2)compared to your catless, probably going to be ever so slightly quieter and maybe less raspy.

Topaz_M4 · 01-23-2019, 04:24 PM

Quote:

Originally Posted by Eschmacher

I just went from stock downpipe to catted vrsf:

1) you get a little smell, not too noticeable

2)compared to your catless, probably going to be ever so slightly quieter and maybe less raspy.

So basically the catted will barely smell and will be pretty much the same sound? Great!

Do you have a sound clip of the catted DP?

Eschmacher · 01-23-2019, 04:33 PM

No, not yet. However I also have an AFE exhaust, so it won't be comparable to your dp + MPE. Mine is very loud with the valve open.

perryo91 · 01-23-2019, 05:18 PM

Quote:

Originally Posted by Eschmacher

No, not yet. However I also have an AFE exhaust, so it won't be comparable to your dp + MPE. Mine is very loud with the valve open.

I'm hoping you do post a video. I've got catless/resonator/mpe and I'm assuming your AFE has a deleted resonator (guess), so it should sound similar to mine if I were to go catted.

Eschmacher · 01-23-2019, 06:14 PM

The AFE has a resonator, but it's basically straight-piped with the valve open, and then it routes through the muffler with the valve closed. I'll try and get a video when I'm not flying all over the country for work.

mike@x-ph.com · 01-23-2019, 10:16 PM

High flow catted downpipe will fix your problem.

It will provide same performance as the catless and will sound quieter.
On WOT and cold start, its still louder than stock

FastF30 · 01-24-2019, 11:38 AM

from my understanding catted dp will be about 95% of flow of a catless... 75% of sound...

Topaz_M4 · 01-24-2019, 11:39 AM

Quote:

Originally Posted by mike@x-ph.com

High flow catted downpipe will fix your problem.

It will provide same performance as the catless and will sound quieter.
On WOT and cold start, its still louder than stock

Great! How is the smell, and also which brand do you recommend?

mike@x-ph.com · 01-24-2019, 11:53 AM

Quote:

Originally Posted by SnakeViper2

Great! How is the smell, and also which brand do you recommend?

Quote:

Originally Posted by SnakeViper2

Thats great! Thats pretty much what I want, but how is the smell? Is it as bad as catless. Obviously it will smell, but as long as its not as bad as catless than im ok.

A quality catted downpipe smell is barely noticeable

Topaz_M4 · 01-24-2019, 12:01 PM

Quote:

Originally Posted by mike@x-ph.com

A quality catted downpipe smell is barely noticeable

Thanks Mike, any recommendations?

mike@x-ph.com · 01-24-2019, 12:01 PM

Quote:

Originally Posted by SnakeViper2

Thanks Mike, any recommendations?

Customers with a flash tune, Wagner Catted

Customers stock or piggybacks, Fabspeed

Topaz_M4 · 01-24-2019, 12:02 PM

Quote:

Originally Posted by mike@x-ph.com

Customers with a flash tune, Wagner Catted

Customers stock or piggybacks, Fabspeed

I have BM3, so ill probably get the Wagner, thanks!

mike@x-ph.com · 01-24-2019, 12:03 PM

Quote:

Originally Posted by SnakeViper2

I have BM3, so ill probably get the Wagner, thanks!

FastF30 · 01-24-2019, 12:47 PM

Quote:

Originally Posted by SnakeViper2

I have BM3, so ill probably get the Wagner, thanks!

It has not been confirmed if BM3 will pass emissions... MHD has been confirmed...

97supratt · 01-27-2019, 12:53 AM

I love catless. It's the smell of success.

bradsm87 · 01-27-2019, 04:33 AM

Get a custom tune with 15.8:1-ish idle and cruise. My money is on the smell dissappearing completely and better economy as a bonus.

Logicoeur · 01-27-2019, 08:01 AM

Quote:

Originally Posted by FastF30

Quote:

Originally Posted by SnakeViper2

I have BM3, so ill probably get the Wagner, thanks!

It has not been confirmed if BM3 will pass emissions... MHD has been confirmed...

Confirmed how

ChrisFulton · 01-27-2019, 08:39 AM

Have Fabspeed sport cat.
No smell. No CEL. Great sound with my MPE.

FastF30 · 01-28-2019, 09:13 AM

Quote:

Originally Posted by Logicoeur

Confirmed how

Pass has been confirmed over in the MHD thread for NY...

FastF30 · 01-28-2019, 10:48 AM

Here... read it for yourself and make your own assumption... click here...

Jeff@TopGearSolutions · 01-28-2019, 03:32 PM

Quote:

Originally Posted by SnakeViper2

I currently have a MPE with a catless downpipe, and i love the sound. But once i added the MPE, the smell of the catless got too strong. So I have two questions.

1) Does a catted DP, (Like ER's 200 CEL) smell? Im ok with a little smell, as long as its nothing crazy.

2) Does it make a difference in sound? Obviously it wont be as loud as my catless, which is ok for me. But for people who have it installed, did you notice a difference in sound?

Also, what catted downpipes do you guys recommend,
Thanks!!

1) Little to negligble smell

2) Quieter then catless, louder then stock. Smoother sound compared to catless.

Wagner, Fabspeed, ER - all great options.

01-23-2019, 04:02 PM	#1
Topaz_M4 N55 435I 18 Rep 27 Posts Drives: 435I M-Sport BM3 VRSF DP Join Date: Jan 2019 Location: LA iTrader: (0)	Catted Downpipe, Smell + Volume? I currently have a MPE with a catless downpipe, and i love the sound. But once i added the MPE, the smell of the catless got too strong. So I have two questions. 1) Does a catted DP, (Like ER's 200 CEL) smell? Im ok with a little smell, as long as its nothing crazy. 2) Does it make a difference in sound? Obviously it wont be as loud as my catless, which is ok for me. But for people who have it installed, did you notice a difference in sound? Also, what catted downpipes do you guys recommend, Thanks!!
	Appreciate 0 Tweet Quote

01-23-2019, 04:10 PM	#2
Eschmacher Car Hypochondriac 396 Rep 920 Posts Drives: 2014 335i M-Sport Estoril Blue Join Date: Feb 2017 Location: Sterling, VA iTrader: (0) Garage List 2018 A4 Allroad [7.50] 2014 BMW 335i [9.00]	I just went from stock downpipe to catted vrsf: 1) you get a little smell, not too noticeable 2)compared to your catless, probably going to be ever so slightly quieter and maybe less raspy.
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01-23-2019, 04:33 PM	#4
Eschmacher Car Hypochondriac 396 Rep 920 Posts Drives: 2014 335i M-Sport Estoril Blue Join Date: Feb 2017 Location: Sterling, VA iTrader: (0) Garage List 2018 A4 Allroad [7.50] 2014 BMW 335i [9.00]	No, not yet. However I also have an AFE exhaust, so it won't be comparable to your dp + MPE. Mine is very loud with the valve open.
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01-23-2019, 06:14 PM	#6
Eschmacher Car Hypochondriac 396 Rep 920 Posts Drives: 2014 335i M-Sport Estoril Blue Join Date: Feb 2017 Location: Sterling, VA iTrader: (0) Garage List 2018 A4 Allroad [7.50] 2014 BMW 335i [9.00]	The AFE has a resonator, but it's basically straight-piped with the valve open, and then it routes through the muffler with the valve closed. I'll try and get a video when I'm not flying all over the country for work.
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01-23-2019, 10:16 PM	#7
mike@x-ph.com BimmerPost Supporting Vendor 27483 Rep 196,924 Posts Drives: 07-335/12-328/18-M4/21-M4CP Join Date: Sep 2013 Location: Las Vegas iTrader: (23)	High flow catted downpipe will fix your problem. It will provide same performance as the catless and will sound quieter. On WOT and cold start, its still louder than stock __________________ Check out our current sale by clicking on this link! https://x-ph.com/sale/ Phone number 702-494-9435
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01-24-2019, 11:38 AM	#8
FastF30 Lieutenant Colonel 523 Rep 1,288 Posts Drives: 2015 335i xdrive Msport Mbrake Join Date: Dec 2017 Location: Middle of the Road iTrader: (0) Garage List 2015 BMW 335i Xdrive [0.00]	from my understanding catted dp will be about 95% of flow of a catless... 75% of sound...
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01-27-2019, 12:53 AM	#16
97supratt First Lieutenant 163 Rep 360 Posts Drives: BMW, Toyota, porsche Join Date: Oct 2017 Location: La crescenta CA iTrader: (6)	I love catless. It's the smell of success.
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01-27-2019, 04:33 AM	#17
bradsm87 Lieutenant Colonel 603 Rep 1,693 Posts Drives: F25 LCI xDrive30d Join Date: Jun 2013 Location: Australia iTrader: (0)	Get a custom tune with 15.8:1-ish idle and cruise. My money is on the smell dissappearing completely and better economy as a bonus.
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01-27-2019, 08:39 AM	#19
ChrisFulton Lieutenant 233 Rep 301 Posts Drives: m235i Join Date: Oct 2016 Location: Pleasanton, CA iTrader: (1)	Have Fabspeed sport cat. No smell. No CEL. Great sound with my MPE.
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01-28-2019, 10:48 AM	#21
FastF30 Lieutenant Colonel 523 Rep 1,288 Posts Drives: 2015 335i xdrive Msport Mbrake Join Date: Dec 2017 Location: Middle of the Road iTrader: (0) Garage List 2015 BMW 335i Xdrive [0.00]	Here... read it for yourself and make your own assumption... click here...
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