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2Addicts | BMW 2-Series forum Technical Topics N55 (M235i) Engine, Transmission, Exhaust, Tuning M235i with quad diffuser - will an M2 MPE fit ??

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      05-04-2016, 01:28 PM   #1
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M235i with quad diffuser - will an M2 MPE fit ??

I'm wander if tailpipe spacing is same/similar for M235i and M2.

is anyone out there fortunate enough to be able to measure the cutout spacings in the rear diffuser of M235i and M2 ???

If so, looking at the photos, can't help thinking an M2 MPE would fit on an Mx35i with a quad diffuser installed ie like Reiger



see for yourselves..




above photos from here:-
http://ind-distribution.com/ind/cate...-valve-control

Comments welcome ??

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      05-06-2016, 12:06 AM   #2
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You and I are on the same boat. We just have to wait.
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      05-06-2016, 01:15 PM   #3
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I want a quad exhaust so bad on my m235i...plus the sound of the m2 is great
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      05-06-2016, 05:54 PM   #4
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I may try and get my hands on a stock m2 muffler once people start giving them away (happens with every new car) people remove factory stuff and just want the old one gone. I want to modify it to just have Dual tips I love the m2s tone and with my downpipe I think would be amazing
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      05-08-2016, 03:05 AM   #5
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Quote:
Originally Posted by Anderw View Post
I may try and get my hands on a stock m2 muffler once people start giving them away (happens with every new car) people remove factory stuff and just want the old one gone. I want to modify it to just have Dual tips I love the m2s tone and with my downpipe I think would be amazing
Andrew - I'm thinking the same. I like stock twin pipes and stock m2 rear box looks easier to modify than the MPE version......Just need that donor stock m2 exhaust or BMW to sell the f30 mppsk exhaust seperately as this looks like dual pipe version of m2 MPE




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      06-01-2016, 04:15 AM   #6
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thinking the same too..
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      06-01-2016, 04:20 AM   #7
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M235,

Not getting very far on trying to get exhaust part numbers !!!

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      06-13-2016, 10:22 PM   #8
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Has any tuner tried this out yet?

I was thinking the exact same thing - has any tuner or person actually taken on this project with an M235i yet?

Firstly, even with the stock M2 exhaust, will it be a similar sound or something completely different?

Secondly (forgetting about the diffuser for a moment) will it actually fit?

Last question, will it increase/decrease performance (taking into consideration it's tuned for the M2), theoretically it may not go the way we would assume.
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      06-13-2016, 11:48 PM   #9
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We did this last year for Big Socal Euro.

You don't need a new exhaust, this was done using the original straight piped single tip. Just have any weld/muffler shop cut the single tips and weld on the duals.

The tricky or not so tricky part, depending on how savvy the end user is, would be sourcing a quad diffuser or modding the existing for a quad set up.



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      07-12-2016, 10:48 PM   #10
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My Question is finding the Width of the muffler with the tips end to end - Then look into a diffuser that can match those measurments....
Guess i'll half to wait for another M2 to come into dealer to measure one up lol.
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      07-13-2016, 02:48 AM   #11
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Using the kinks in the rear light clusters as a go-by and comparing the M235i and M2 rear views, My findings so far are as follows:-
  1. an M235i quad spacing is wider than M2 quad set up.
  2. Using a aftermarket m235i quad diffuser would mean that cutouts would too far apart for M2 exhaust retrofit.
  3. It could work if you elongated both the existing outlets on an m235i diffuser inwards to suit the M2 quads.
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      11-22-2016, 11:39 AM   #12
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Bump, any updates on this?
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      11-24-2016, 04:05 AM   #13
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No clue if that'll work, but if you get tired of waiting and don't feel like a guinea pig, I've been very happy with the Eisenmann quad-tip exhaust (I paired it with a resonated Remus front section, saving a lot of money versus the Eisenmann one). JL Motoring cut the CF diffuser for me and would probably be willing to do the same for you now that they have the dimensions measured, etc.

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      12-22-2016, 09:34 PM   #14
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Screw Fitting a M2 OEM exhaust to the car.. i want that Akrapolvic exhaust for the M2 on my 235..Dat Sound
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      03-06-2017, 03:29 PM   #15
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Bump, any aftermarket quad diffuser for us trying to retrofit? I have an M2 exhaust coming soon and I can post up the tailpipe width dimensions if anyone is interested

Here are some options I found:
http://ind-distribution.com/ind/cate...rdiffuser-1292
http://ind-distribution.com/ind/cate...-rear-diffuser
These look like the same product but are listed with a different PN. Dunno what the difference is, if any.

https://www.aliexpress.com/item/F22-...691549455.html
https://www.aliexpress.com/item/M235...371171013.html
I reached out to the seller for some more pictures of these.

Last edited by wntrsnowg; 03-06-2017 at 05:18 PM.. Reason: added links
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      03-07-2017, 09:10 AM   #16
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Here is another on ebay:
http://www.ebay.com/itm/3D-Style-Car...-/272479863727
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      08-10-2017, 03:53 PM   #17
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so what did you do here?

Did you mould the m performance one or did you get different brand diffuser and if so which?


Quote:
Originally Posted by PDU View Post
We did this last year for Big Socal Euro.

You don't need a new exhaust, this was done using the original straight piped single tip. Just have any weld/muffler shop cut the single tips and weld on the duals.

The tricky or not so tricky part, depending on how savvy the end user is, would be sourcing a quad diffuser or modding the existing for a quad set up.



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      09-05-2017, 05:21 PM   #18
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Quote:
Originally Posted by PDU View Post
We did this last year for Big Socal Euro.

You don't need a new exhaust, this was done using the original straight piped single tip. Just have any weld/muffler shop cut the single tips and weld on the duals.

The tricky or not so tricky part, depending on how savvy the end user is, would be sourcing a quad diffuser or modding the existing for a quad set up.



I believe this is the autoplus diffuser but did you cut it to make it fir the quad exhaust?
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      09-05-2017, 06:30 PM   #19
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Not digging all painted white back but whatever rocks your boat. How was fitment of these Asian knock offs? Can you take close ups? Thanks.
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      01-16-2018, 02:27 PM   #20
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Quote:
Originally Posted by wntrsnowg View Post
this one looks like it would work with the M2 exhaust.

wonder what fitment would be like?
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      01-16-2018, 03:09 PM   #21
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Quote:
Originally Posted by Hasser View Post
this one looks like it would work with the M2 exhaust.

wonder what fitment would be like?
I was looking at that one myself. I picked up a an M2 exhaust sometime last year, and have been toying around with different ideas. I like the autoplus rear diffuser the best, but price wise for hacking it up after having paid nearly 1k when all is said and down didn't sit right with me.

The one you linked I looked at, but other products from that company I saw some odd fitment reviews. What I ended up doing was ordering a Vicrez rear diffuser. I guess their prices went up a bit, I think when I got it, I paid around $380?

https://www.vicrez.com/vicrez-bmw-2-...user-vz100426/

I haven't installed it yet, its just been sitting around for the past couple of months, but I plan on having everything installed in the next couple of weeks here.

Their diffuser is more or less a copy of the Autoplus one, with some minor differences.
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      01-16-2018, 03:16 PM   #22
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I like the auto plus too, cant seem to find anywhere to buy it though.

so you plan to cut this Vicrez to accept the quad tips?

and I don't really want CF as I have not gone the Cf exterior route on mods.
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