Best Catted Downpipe

Captain-BK · 09-28-2025, 02:28 AM

Hello Team,

From your experience, can anyone recommend the best performing Catted Downpipe? I'm currently running OEM downpipes, VRSF single midpipe and Akrapovic exhaust. Trying to avoid the catless smell as best as possible.

Thanks for your help!

b_w. · 09-28-2025, 10:48 AM

Stick with oem

afadeev · 09-28-2025, 11:17 AM

OEM

Sndmem3s · 09-28-2025, 01:12 PM

I run CTS Turbo 200 cel downpipes. Zero issues, minimal smell

b_w. · 09-28-2025, 02:55 PM

My point is to what end goal are you replacing them? OEM is good for a lot of power. I understand it if you are going catless but just to replace them just because makes no sense.

Captain-BK · 09-29-2025, 12:54 AM

Quote:

Originally Posted by b_w.

stick with oem

👍🏼

Captain-BK · 09-29-2025, 12:56 AM

Quote:

Originally Posted by b_w.

My point is to what end goal are you replacing them? OEM is good for a lot of power. I understand it if you are going catless but just to replace them just because makes no sense.

Thanks for your reply - I'm just wondering if there's a better performing, catted downpipe compared to the OEM. I understand the catless would give me more gains but I'm searching for something better than OEM.

Captain-BK · 09-29-2025, 12:57 AM

Quote:

Originally Posted by afadeev

OEM

Thank you!

Captain-BK · 09-29-2025, 12:57 AM

Quote:

Originally Posted by Sndmem3s

I run CTS Turbo 200 cel downpipes. Zero issues, minimal smell

Thank you, I'll research this item. 👍🏼

mike@x-ph.com · 09-29-2025, 03:18 PM

Best for smell is active autowerke since its 400 CEL + you get no CEL

M3SQRD · 10-02-2025, 01:59 AM

Quote:

Originally Posted by mike@x-ph.com

Best for smell is active autowerke since its 400 CEL + you get no CEL

Plus it’s EPA registered, correct?

carbon//m3 · 10-02-2025, 01:34 PM

Quote:

Originally Posted by mike@x-ph.com

Best for smell is active autowerke since its 400 CEL + you get no CEL

I have these and got them from Mike, I also have pure stage 2 turbos with no cel. Fit and finish is top notch!

mike@x-ph.com · 10-02-2025, 02:44 PM

Quote:

Originally Posted by M3SQRD

Plus it’s EPA registered, correct?

Correct Active & GESI cats that are used in the active downpipes are both EPA approved

Quote:

Originally Posted by carbon//m3

I have these and got them from Mike, I also have pure stage 2 turbos with no cel. Fit and finish is top notch!

09-28-2025, 02:28 AM	#1
Captain-BK New Member 0 Rep 7 Posts Drives: BMW M4 Join Date: Aug 2024 Location: Canada iTrader: (0)	Best Catted Downpipe - F82 Hello Team, From your experience, can anyone recommend the best performing Catted Downpipe? I'm currently running OEM downpipes, VRSF single midpipe and Akrapovic exhaust. Trying to avoid the catless smell as best as possible. Thanks for your help!
	Appreciate 0 Tweet Quote

09-28-2025, 10:48 AM	#2
b_w. Major 1206 Rep 1,233 Posts Drives: ST F80 M3 GT More 6 SPD, F90 C Join Date: Jul 2022 Location: Alberta iTrader: (1)	Stick with oem
	Appreciate 2 afadeev3549.00 Kilabyte4082.00 Quote

09-28-2025, 11:17 AM	#3
afadeev Brigadier General 3549 Rep 3,152 Posts Drives: F80 M3 Join Date: Jan 2012 Location: NYC iTrader: (0)	OEM __________________ '15 F80 M3 (SO/SS) '21 TM3P (Blue/White) '25 Lexus RZ (White/Blue) ex-'17 I01 i3-BEV (PB/DD), ex-'15 I01 i3-REX, ex-E90, E46, E36's, E30's
	Appreciate 0 Quote

09-28-2025, 01:12 PM	#4
Sndmem3s Registered 54 Rep 79 Posts Drives: 2015 M3 Join Date: Jul 2024 Location: Phoenix iTrader: (0)	I run CTS Turbo 200 cel downpipes. Zero issues, minimal smell
	Appreciate 0 Quote

09-28-2025, 02:55 PM	#5
b_w. Major 1206 Rep 1,233 Posts Drives: ST F80 M3 GT More 6 SPD, F90 C Join Date: Jul 2022 Location: Alberta iTrader: (1)	My point is to what end goal are you replacing them? OEM is good for a lot of power. I understand it if you are going catless but just to replace them just because makes no sense.
	Appreciate 1 afadeev3549.00 Quote

09-29-2025, 03:18 PM	#10
mike@x-ph.com BimmerPost Supporting Vendor 31238 Rep 203,600 Posts Drives: 07-335/12-328/18-M4/21-M4CP Join Date: Sep 2013 Location: Las Vegas iTrader: (23)	Best for smell is active autowerke since its 400 CEL + you get no CEL __________________ Check out our current sale by clicking on this link! https://x-ph.com/sale/ Phone number 702-494-9435
	Appreciate 1 WarMachineM386.00 Quote