To loud at WOT cattless dp and single mid pipe.

brad65ford · 08-20-2022, 10:00 AM

Crazy, I'm getting old lol. Recently picked up a used 2022 M3 and previous owner did catless dp's and single mid pipe (no tune). I like the sound and its nice having control over the exhaust flaps with the buttons. It sound awesome in sport or sport plus as well but once you go WOT holy hell does it howl and is really loud lol. Surprisingly the smell isn't that bad for being cat less which is really surprising. Anyway I'm wondering what I can do to make it quiet again without going crazy on a whole new exhaust system. Unfortunately we don't have the stock parts from the original owner. I'm wondering how much the mid pipes vs the dp's that are making it so loud or which I should replace? Any suggestions are more than welcome. Thank you in advanced.

BIGW0RM · 08-20-2022, 10:01 AM

Its the DP's. Get some stock ones and put them back on. It will tame it.

brad65ford · 08-20-2022, 10:02 AM

Quote:

Originally Posted by BIGW0RM

Its the DP's. Get some stock ones and put them back on. It will tame it.

Right on! I would if I had them and I know its going to cost an arm and a leg for OEM ones, is there an aftermarket catted downpipe that will not through a check engine light?

RonBurgundy · 08-20-2022, 10:02 AM

Definitely the downpipes

brad65ford · 08-20-2022, 10:03 AM

And I'm assuming its safe to say the bassy tone sound is coming from the single mid pipe?

BIGW0RM · 08-20-2022, 10:05 AM

Quote:

Originally Posted by brad65ford

Right on! I would if I had them and I know its going to cost an arm and a leg for OEM ones, is there an aftermarket catted downpipe that will not through a check engine light?

Check the member marketplace for a set. That or look for some SPORT cats. Do you have a check engine light on now with your catless DP's?

brad65ford · 08-20-2022, 10:06 AM

Quote:

Originally Posted by BIGW0RM

Check the member marketplace for a set. Do you have a check engine light on now with your catless DP's?

Correct, check engine codes are cat efficient codes at the moment. Had her on the lift and they are straight piped, can't see the make/brand. The mid pipe is Valve tronic.

BIGW0RM · 08-20-2022, 10:11 AM

Quote:

Originally Posted by brad65ford

Correct, check engine codes are cat efficient codes at the moment. Had her on the lift and they are straight piped, can't see the make/brand. The mid pipe is Valve tronic.

I think active autowerke offers sport cats. Id look into those. Or jump into the member marketplace. People are selling OEM ones all the time in there.

This member asked for some and many people had some to offer.
https://g80.bimmerpost.com/forums/sh....php?t=1933993

brad65ford · 08-20-2022, 10:25 AM

Thank you!

BMWM4CX · 08-20-2022, 11:37 AM

Quote:

Originally Posted by brad65ford

Thank you!

Redstar Exhausts do sports cats at various cells. They're not cheap but they're really good quality and perfect fitment.

mike@x-ph.com · 08-20-2022, 04:19 PM

[QUOTE=BIGW0RM;29243274]I think active autowerke offers sport cats. Id look into those. Or jump into the member marketplace. People are selling OEM ones all the time in there.

This member asked for some and many people had some to offer.
/QUOTE]

+1 for the Active Autowerke catted. It tames the sound from the catless setup but keeps it aggressive. Also no check engine light.

Sbm007 · 08-20-2022, 04:29 PM

Quote:

Originally Posted by BIGW0RM

I think active autowerke offers sport cats. Id look into those. Or jump into the member marketplace. People are selling OEM ones all the time in there.

This member asked for some and many people had some to offer.
https://g80.bimmerpost.com/forums/sh....php?t=1933993

Interesting, the downpipes in that photo are actually mine, in fact I took that photo in my living room.

Those are actually 200 cell Topgear Eurosports downpipes in that photo - work great, still on my car

BIGW0RM · 08-20-2022, 10:24 PM

Quote:

Originally Posted by Sbm007

Interesting, the downpipes in that photo are actually mine, in fact I took that photo in my living room.

Those are actually 200 cell Topgear Eurosports downpipes in that photo - work great, still on my car

I admit, I stole the pics off this forum to show the OP his options. I did not know those where not active brand though. Thank you for the clarification.

Nicklv_m3 · 08-22-2022, 02:08 PM

Active Autowerke or ApexBuilt both use GESI Catted Downpipes which are the top quality and no CEL guarantee cats.

I have ApexBuilt ones on my car and they have been perfect.

Neophyte · 08-22-2022, 03:08 PM

Interesting that everyone is blaming the DPs. I have DPs only on my X4M and I can barely tell the difference in sound.

G-Breazy · 08-22-2022, 07:10 PM

Quote:

Originally Posted by brad65ford

And I'm assuming its safe to say the bassy tone sound is coming from the single mid pipe?

I’m curious does your setup add any drone in comfort mode valves closed at any rpm? Also maybe try adding back the secondary cats only. That would seem like a sweet spot to me.

I’m actually thinking of doing catless downpipes, leave on secondary cats and delete only 1 resonator. Probably just the first one, as the secondary resonator has the xpipe.

brad65ford · 08-22-2022, 07:18 PM

its amazingly quiet when you want it to be there is no drone at all. I'm still blown away how quiet and loud it can be depending how hard your on the pedal. Have a feeling it has to do with the valved exhaust BMW did, they are closing the flaps even though your in sport + etc.

brad65ford · 08-22-2022, 08:51 PM

Quote:

Originally Posted by Neophyte

Interesting that everyone is blaming the DPs. I have DPs only on my X4M and I can barely tell the difference in sound.

is that all that is on the exhaust? The catless dp with a single mid pipe with stock cat back sounds like at trumpet exploding from an elephant stepping on it.

madmedman · 08-23-2022, 03:02 AM

Quote:

Originally Posted by brad65ford

is that all that is on the exhaust? The catless dp with a single mid pipe with stock cat back sounds like at trumpet exploding from an elephant stepping on it.

Man, that description makes me want to get your setup. I have Valvetronic + MPE + vsc and I want more

I have tried Valvetronic + stock backbox + oem valve control and couldn't hear anything even with pedal to the metal.

brad65ford · 08-23-2022, 05:13 AM

Quote:

Originally Posted by madmedman

Man, that description makes me want to get your setup. I have Valvetronic + MPE + vsc and I want more

I have tried Valvetronic + stock backbox + oem valve control and couldn't hear anything even with pedal to the metal.

Yeah its all in the dp's I'm assuming its safe to say. My last two s55 exhaust setups I did resonated DP's and then Catted. The catted was so much quieter. Catless is pretty much nasty, personally not my liking though. Let me know if you want to switch dp's

Neophyte · 08-23-2022, 08:20 AM

Quote:

Originally Posted by brad65ford

Quote:

Originally Posted by Neophyte

Interesting that everyone is blaming the DPs. I have DPs only on my X4M and I can barely tell the difference in sound.

is that all that is on the exhaust? The catless dp with a single mid pipe with stock cat back sounds like at trumpet exploding from an elephant stepping on it.

Yes, that's all I have.

Great description of the sound btw.

brad65ford · 08-23-2022, 01:08 PM

its so strange of an exhaust sound to me. Its not consistent, meaning you can't hold an rpm range and have that sound tone/sound as it does per say when your under load. It has to be under load to get an enjoyable sound which imho sucks because you can not carry it as you drive along an over pass/bridge etc..., I don't want to be wot just to hear an echo. Hopefully that makes sense lol. Not sure if its all because of the valved exhaust flaps are closing on us once load is backed off? To me exhaust is everything when it comes to enjoyment with a car aside from power.

08-20-2022, 10:00 AM	#1
brad65ford Captain 256 Rep 764 Posts Drives: 2022 M3 Join Date: Oct 2015 Location: fl iTrader: (0)	To loud at WOT cattless dp and single mid pipe. Crazy, I'm getting old lol. Recently picked up a used 2022 M3 and previous owner did catless dp's and single mid pipe (no tune). I like the sound and its nice having control over the exhaust flaps with the buttons. It sound awesome in sport or sport plus as well but once you go WOT holy hell does it howl and is really loud lol. Surprisingly the smell isn't that bad for being cat less which is really surprising. Anyway I'm wondering what I can do to make it quiet again without going crazy on a whole new exhaust system. Unfortunately we don't have the stock parts from the original owner. I'm wondering how much the mid pipes vs the dp's that are making it so loud or which I should replace? Any suggestions are more than welcome. Thank you in advanced. Last edited by brad65ford; 09-04-2022 at 01:10 PM..
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08-20-2022, 10:01 AM	#2
BIGW0RM You got my money? 3158 Rep 4,646 Posts Drives: Ice Cream Truck Join Date: Jul 2011 Location: ///OC iTrader: (14) Garage List 2022 BMW M3 [9.50]	Its the DP's. Get some stock ones and put them back on. It will tame it. __________________ 2022 G80 M3 Competition X / 2020 Range Rover Sport P525 / 2023 Ford Raptor
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08-20-2022, 10:02 AM	#4
RonBurgundy Private First Class 109 Rep 183 Posts Drives: - Join Date: Sep 2011 Location: Sydney iTrader: (0)	Definitely the downpipes
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08-20-2022, 10:03 AM	#5
brad65ford Captain 256 Rep 764 Posts Drives: 2022 M3 Join Date: Oct 2015 Location: fl iTrader: (0)	And I'm assuming its safe to say the bassy tone sound is coming from the single mid pipe?
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08-20-2022, 10:25 AM	#9
brad65ford Captain 256 Rep 764 Posts Drives: 2022 M3 Join Date: Oct 2015 Location: fl iTrader: (0)	Thank you!
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08-20-2022, 04:19 PM	#11
mike@x-ph.com BimmerPost Supporting Vendor 24204 Rep 190,807 Posts Drives: 07-335/12-328/18-M4/21-M4CP Join Date: Sep 2013 Location: Las Vegas iTrader: (23)	[QUOTE=BIGW0RM;29243274]I think active autowerke offers sport cats. Id look into those. Or jump into the member marketplace. People are selling OEM ones all the time in there. This member asked for some and many people had some to offer. /QUOTE] +1 for the Active Autowerke catted. It tames the sound from the catless setup but keeps it aggressive. Also no check engine light. __________________ Check out our current sale by clicking on this link! https://x-ph.com/sale/ Phone number 702-494-9435
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08-22-2022, 02:08 PM	#14
Nicklv_m3 Private First Class 196 Rep 167 Posts Drives: 22' M3 Comp, 21' X3 M40i Join Date: Jan 2016 Location: Las Vegas, NV iTrader: (0)	Active Autowerke or ApexBuilt both use GESI Catted Downpipes which are the top quality and no CEL guarantee cats. I have ApexBuilt ones on my car and they have been perfect. __________________ IG: @nicklv_m3h
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08-22-2022, 03:08 PM	#15
Neophyte Second Lieutenant 158 Rep 221 Posts Drives: 2022 BMW X4M Comp Join Date: Dec 2017 Location: MI iTrader: (0)	Interesting that everyone is blaming the DPs. I have DPs only on my X4M and I can barely tell the difference in sound. __________________ IG: @f98comp
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08-22-2022, 07:18 PM	#17
brad65ford Captain 256 Rep 764 Posts Drives: 2022 M3 Join Date: Oct 2015 Location: fl iTrader: (0)	its amazingly quiet when you want it to be there is no drone at all. I'm still blown away how quiet and loud it can be depending how hard your on the pedal. Have a feeling it has to do with the valved exhaust BMW did, they are closing the flaps even though your in sport + etc.
	Appreciate 0 Quote

08-23-2022, 01:08 PM	#22
brad65ford Captain 256 Rep 764 Posts Drives: 2022 M3 Join Date: Oct 2015 Location: fl iTrader: (0)	its so strange of an exhaust sound to me. Its not consistent, meaning you can't hold an rpm range and have that sound tone/sound as it does per say when your under load. It has to be under load to get an enjoyable sound which imho sucks because you can not carry it as you drive along an over pass/bridge etc..., I don't want to be wot just to hear an echo. Hopefully that makes sense lol. Not sure if its all because of the valved exhaust flaps are closing on us once load is backed off? To me exhaust is everything when it comes to enjoyment with a car aside from power.
	Appreciate 0 Quote