X3M exhaust and diffuser on M40i ?

rob175 · 05-12-2021, 09:27 AM

IMHO....In the "race" to make your BMW sound as obnoxious as you can I think you have a "winner"! Sounds like a "kids car" (ie: noise = cool).....NOT!

My summer car is my Porsche.....it's very quiet, BUT will kick the butt of most that want to challenge me off the line......Like Teddy said "speak softly and carry a big stick!"

joft6 · 05-12-2021, 10:26 AM

Quote:

Originally Posted by Jims M3

There is a good replica X3M diffuser available, I installed it on my X3 M40i and bought some carbon tips off of Ebay. They look fantastic. The only thing that doesn't match is the body colored paint on the diffuser.

Quote:

Originally Posted by Jims M3

There is a good replica X3M diffuser available, I installed it on my X3 M40i and bought some carbon tips off of Ebay. They look fantastic. The only thing that doesn't match is the body colored paint on the diffuser.

Is it alright if you could snap us some pictures?

Alias1431 · 05-12-2021, 06:11 PM

Quote:

Originally Posted by Jims M3

There is a good replica X3M diffuser available, I installed it on my X3 M40i and bought some carbon tips off of Ebay. They look fantastic. The only thing that doesn't match is the body colored paint on the diffuser.

Link! :-)

Jims M3 · 05-16-2021, 04:22 PM

I think I may get the upper portion painted to match the alpine white, I put on the carbon fiber M tips. It really looks good in my opinion.

dinan5m3 · 05-16-2021, 04:44 PM

Quote:

Originally Posted by Jims M3

It really looks good in my opinion.

Any picture from underside?

What inlet size did you go with?

Jims M3 · 05-16-2021, 07:53 PM

Quote:

Originally Posted by dinan5m3

Any picture from underside?

What inlet size did you go with?

I got these and then took it to a muffler shop they welded in a short piece to customize to the opening.

https://www.ebay.com/itm/11394076799...53.m2749.l2649

Cost $60 to get them installed

This was the diffuser fit perfect

https://www.ebay.com/itm/15424542978...53.m2749.l2649

leon360x · 05-16-2021, 11:06 PM

Quote:

Originally Posted by Jims M3

I think I may get the upper portion painted to match the alpine white, I put on the carbon fiber M tips. It really looks good in my opinion.

This modification is superb, turned out really good, how's the sound?

srk4nd4a · 05-17-2021, 03:01 AM

I have installed tail pipes and diffuser on 30d. What do you think?
Diffuser and tailpipes are replica. Details and work cost me around US$500

https://ibb.co/825fxsr
https://ibb.co/2PRTvSK
https://ibb.co/C8stMSd
https://ibb.co/tDjgCyr
https://ibb.co/L0dBVhz

Jims M3 · 05-17-2021, 07:36 AM

Quote:

Originally Posted by leon360x

This modification is superb, turned out really good, how's the sound?

Haven't really noticed any difference in sound. But the X3 looks really cool. The gray never looked right to me with everything else being black.

dinan5m3 · 05-17-2021, 03:59 PM

Quote:

Originally Posted by Jims M3

I got these and then took it to a muffler shop they welded in a short piece to customize to the opening.

https://www.ebay.com/itm/11394076799...53.m2749.l2649

Cost $60 to get them installed

This was the diffuser fit perfect

https://www.ebay.com/itm/15424542978...53.m2749.l2649

Any chance, when you can show how that customization came out with that short piece?

That ebay item is the same one that this person used as well on the X4, came out good also.

https://x3.xbimmers.com/forums/showp...5&postcount=13

eBay item number:113940767998

Okay, looks like the inlet ID/OD of 63mm/66mm worked out okay too in X3.

Jims M3 · 05-18-2021, 08:19 AM

Quote:

Originally Posted by dinan5m3

Any chance, when you can show how that customization came out with that short piece?

That ebay item is the same one that this person used as well on the X4, came out good also.

https://x3.xbimmers.com/forums/showp...5&postcount=13

eBay item number:113940767998

Okay, looks like the inlet ID/OD of 63mm/66mm worked out okay too in X3.

It literally is a 4 inch piece of pipe clamped into the tip and then welded to the cut off end of the original exhaust.

Drexel_Lake · 05-22-2021, 02:48 PM

Quote:

Originally Posted by Jims M3

Haven't really noticed any difference in sound. But the X3 looks really cool. The gray never looked right to me with everything else being black.

Bingo! First mod on my list.

lukasm60b40 · 05-24-2021, 04:54 PM

Quote:

Originally Posted by srk4nd4a

I have installed tail pipes and diffuser on 30d. What do you think?
Diffuser and tailpipes are replica. Details and work cost me around US$500

https://ibb.co/825fxsr
https://ibb.co/2PRTvSK
https://ibb.co/C8stMSd
https://ibb.co/tDjgCyr
https://ibb.co/L0dBVhz

Hi where you get your exhaust tips ? they looks very like x3m oem ?
Thanks

srk4nd4a · 05-25-2021, 01:37 AM

Quote:

Originally Posted by lukasm60b40

Hi where you get your exhaust tips ? they looks very like x3m oem ?
Thanks

I found local guys who reinstalling BMWs and MBs to M and AMG. They sold me parts and install them day by day. They say that parts are Chinese replica.

You can try to find parts on Aliexpress, but buy it with care.

lukasm60b40 · 05-25-2021, 04:07 PM

Quote:

Originally Posted by srk4nd4a

I found local guys who reinstalling BMWs and MBs to M and AMG. They sold me parts and install them day by day. They say that parts are Chinese replica.

You can try to find parts on Aliexpress, but buy it with care.

thanks for info

Drexel_Lake · 05-28-2021, 04:14 PM

Jims M3, How did you remove the two round parts on the top each end? I received the diffuser today. Tabs look easy enough, but no clue what behind those round pieces. Of course no instructions were included. Thanks

nycxjc1 · 11-30-2022, 10:57 PM

Apologies in advance to revive a thread that's 1.5 years old.

I've been doing a whole lot of research and can't seem to get all the answers that I would like before moving forward.

I'm looking to see if anyone else has done this exact mod successfully (M40i with X3M/X3MC stock muffler), given that so much time have passed. It would be great if I can see pics of this too.

From research, these are the parts required:
1. Diffuser, which I'll get from eBay that Jims M3 posted
1a. Diffuser mod, trim the openings a bit to fit 2x100mm tips on each side + gapping
2. Resonator brackets, p/n 18309882488 rear left and 18309882565 rear right
3. Clamping bush x2 D=70mm, p/n 18307560780
4. Wire harness, will be custom made to split for the exhaust flap actuator since there are 2 of them

If someone had this installed successfully, can you shed some light if there's any other part that I'm missing or anything else that I would need to do?

I'm NOT looking to install the Dahler/Fi exhaust or cut the M40i tips and add the dual tips on each side.

nycxjc1 · 12-03-2022, 01:28 AM

Bump
Nobody?

Marc R · 04-13-2024, 05:25 AM

Quote:

Originally Posted by nycxjc1

Apologies in advance to revive a thread that's 1.5 years old.

I've been doing a whole lot of research and can't seem to get all the answers that I would like before moving forward.

I'm looking to see if anyone else has done this exact mod successfully (M40i with X3M/X3MC stock muffler), given that so much time have passed. It would be great if I can see pics of this too.

From research, these are the parts required:
1. Diffuser, which I'll get from eBay that Jims M3 posted
1a. Diffuser mod, trim the openings a bit to fit 2x100mm tips on each side + gapping
2. Resonator brackets, p/n 18309882488 rear left and 18309882565 rear right
3. Clamping bush x2 D=70mm, p/n 18307560780
4. Wire harness, will be custom made to split for the exhaust flap actuator since there are 2 of them

If someone had this installed successfully, can you shed some light if there's any other part that I'm missing or anything else that I would need to do?

I'm NOT looking to install the Dahler/Fi exhaust or cut the M40i tips and add the dual tips on each side.

Did you ever figure this out? I really hate the look of the M40i exhaust.... X3M muffler seems a good option to swap.

RICH S202 · 04-13-2024, 07:37 AM

Here you go. Cutting and welding still required though.

https://monacoms.com/bmw-x3-x4-g01-g...-exhaust-tips/

Marc R · 04-13-2024, 08:49 AM

Quote:

Originally Posted by RICH S202

Here you go. Cutting and welding still required though.

https://monacoms.com/bmw-x3-x4-g01-g...-exhaust-tips/

Thanks but i prefer to go the OEM+ route... not trying to make my M40i an M but rather upgrading certain parts.
I just happen to be a sucker for OEM

Marc R · 05-02-2024, 10:26 AM

An update from my side:

I've bought a second hand X3MC muffler (black tips) and ordered the brackets for the exhaust (which are different from the G01), also ordered 70mm sleeves to connect the pipes under the car.
Furthermore i have bought an X3M diffusor which is still underway and needs to be painted.

The X3M has 2 actuators on the exhaust so i have bought one which i will connect to the OEM actuator.

Lets see if i can get this fixed.

05-12-2021, 09:27 AM	#23
rob175 Major 694 Rep 1,120 Posts Drives: BMW X3 xiDrive30 Join Date: Feb 2020 Location: Illinois iTrader: (0)	IMHO....In the "race" to make your BMW sound as obnoxious as you can I think you have a "winner"! Sounds like a "kids car" (ie: noise = cool).....NOT! My summer car is my Porsche.....it's very quiet, BUT will kick the butt of most that want to challenge me off the line......Like Teddy said "speak softly and carry a big stick!"
	Appreciate 0 Quote

05-16-2021, 04:22 PM	#26
Jims M3 First Lieutenant 457 Rep 312 Posts Drives: F95 X5M, F80 M3, C7 Z51 Join Date: Jan 2013 Location: Aledo, TX iTrader: (1)	I think I may get the upper portion painted to match the alpine white, I put on the carbon fiber M tips. It really looks good in my opinion. Attached Images
	Appreciate 5 leon360x139.50 X3MTB58.50 bdewitt50.00 nycxjc16.00 jwong77332.50 Quote

05-17-2021, 03:01 AM	#30
srk4nd4a New Member 14 Rep 16 Posts Drives: BMW X3 G01 2021 pre-LCI M40i Join Date: May 2021 Location: Moscow iTrader: (0)	I have installed tail pipes and diffuser on 30d. What do you think? Diffuser and tailpipes are replica. Details and work cost me around US$500 https://ibb.co/825fxsr https://ibb.co/2PRTvSK https://ibb.co/C8stMSd https://ibb.co/tDjgCyr https://ibb.co/L0dBVhz Last edited by srk4nd4a; 05-17-2021 at 03:02 AM.. Reason: images are not attached
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05-28-2021, 04:14 PM	#38
Drexel_Lake Private 24 Rep 92 Posts Drives: BMW X3 M40i 330cic Join Date: May 2021 Location: South Carolina USA iTrader: (0) Garage List 2020 BMW X3 M40i [10.00] 2005 BMW 330ci [5.00]	Jims M3, How did you remove the two round parts on the top each end? I received the diffuser today. Tabs look easy enough, but no clue what behind those round pieces. Of course no instructions were included. Thanks __________________ 2020 X3 M40i Blue 2005 Supercharged 330ci Silver/Black vert.
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11-30-2022, 10:57 PM	#39
nycxjc1 New Member 6 Rep 28 Posts Drives: 335i and X3M40i Join Date: Jul 2013 Location: SF/NYC iTrader: (0)	Apologies in advance to revive a thread that's 1.5 years old. I've been doing a whole lot of research and can't seem to get all the answers that I would like before moving forward. I'm looking to see if anyone else has done this exact mod successfully (M40i with X3M/X3MC stock muffler), given that so much time have passed. It would be great if I can see pics of this too. From research, these are the parts required: 1. Diffuser, which I'll get from eBay that Jims M3 posted 1a. Diffuser mod, trim the openings a bit to fit 2x100mm tips on each side + gapping 2. Resonator brackets, p/n 18309882488 rear left and 18309882565 rear right 3. Clamping bush x2 D=70mm, p/n 18307560780 4. Wire harness, will be custom made to split for the exhaust flap actuator since there are 2 of them If someone had this installed successfully, can you shed some light if there's any other part that I'm missing or anything else that I would need to do? I'm NOT looking to install the Dahler/Fi exhaust or cut the M40i tips and add the dual tips on each side.
	Appreciate 0 Quote

12-03-2022, 01:28 AM	#40
nycxjc1 New Member 6 Rep 28 Posts Drives: 335i and X3M40i Join Date: Jul 2013 Location: SF/NYC iTrader: (0)	Bump Nobody?
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04-13-2024, 07:37 AM	#42
RICH S202 Private First Class 72 Rep 107 Posts Drives: BMW m240i Join Date: Jun 2023 Location: Michigan iTrader: (0)	Here you go. Cutting and welding still required though. https://monacoms.com/bmw-x3-x4-g01-g...-exhaust-tips/
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05-02-2024, 10:26 AM	#44
Marc R Mr Anderson,we've been expecting you... 26 Rep 210 Posts Drives: X3 M40i Join Date: May 2012 Location: Dept. of Justice iTrader: (0)	An update from my side: I've bought a second hand X3MC muffler (black tips) and ordered the brackets for the exhaust (which are different from the G01), also ordered 70mm sleeves to connect the pipes under the car. Furthermore i have bought an X3M diffusor which is still underway and needs to be painted. The X3M has 2 actuators on the exhaust so i have bought one which i will connect to the OEM actuator. Lets see if i can get this fixed.
	Appreciate 0 Quote