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2Addicts | BMW 2-Series forum Technical Topics N55 (M235i) Engine, Transmission, Exhaust, Tuning M235i How to make louder

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      04-23-2017, 08:34 PM   #23
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Originally Posted by weyland View Post
Bump - how are people getting on with the M2 lower airbox mod? Worthwhile upgrade?

I would only be doing it for a bit more engine noise...
I love it and I'm the type that provides honest to God reviews. If it didn't make any change in sound, I say so and yank it. Don't fool yourself into thinking it's going to sound like an aftermarket intake though, because it won't. It's probably 30% louder than the OEM airbox.

I've recently also yanked the underhood insulation (the M2/3/4 don't run it either) and that too made a bit of a difference in turbo noises coming from the front of the car.
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      04-23-2017, 09:28 PM   #24
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The intake upgrade works well too. I noticed a significant increase in sound from the dinan intake, though there are plenty of good intakes out there prob cheaper.

A sport cat is great, In all honestly dont go catless. Im not a green peace trooper but we need to keep our air clean.
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      04-24-2017, 08:46 AM   #25
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I'm mainly after noise now. My car is well modded but coming from a type R background with ram intakes, I'm finding the m235 a little bland on the nose front.

Will look at removing sound deadening under the bonnet and fitting the modified lower airbox.

Aside from my local stealer, can anyone recommend a good place n the UK to buy this from?
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      04-24-2017, 11:50 AM   #26
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Quote:
Originally Posted by weyland View Post
I'm mainly after noise now. My car is well modded but coming from a type R background with ram intakes, I'm finding the m235 a little bland on the nose front.
Keep in mind that turbos suppress induction noise to a large extent. If you want the most induction noise possible, then you should go with an open cone intake. Just remember that open cone intakes are known to create a whole host of annoying issues on these cars.
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      04-24-2017, 03:52 PM   #27
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Thanks. I'll get my hands on the airbox and remove some sound deadening and go from there.

I guess after that it is downpipes for noise.
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      05-14-2017, 02:59 PM   #28
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Fitted the MPPK airbox enclosure and loving it! Also removed soundproofing from under bonnet.

Suprised by how audible turbo whistles and wastegate noise is based upon other people's comments - I think it sounds brilliant and is as a great upgrade!

Thanks for the pointers people...
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      07-29-2017, 07:13 PM   #29
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Just installed the M2 lower (MPPK) airbox a few days ago and I love it. Got it from Turner Motorsports for around $200 shipped.

I like the fact that it's an OEM part and not a full on intake. I makes just enough sound IMO about 2x louder than stock. Definitely sounds more aggressive without being overly loud. Thank you for posting the part #. It was exactly what I was looking for.
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      07-29-2017, 08:15 PM   #30
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Installed Dinan resonator delete pipe on my wife's 235 and it's perfect.
Not too loud but definitely noticeable.
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      07-29-2017, 08:32 PM   #31
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Cattless down pipe and muffler delete, loud as f*ck.
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      08-28-2017, 06:18 AM   #32
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Hi Guys,

Installed a Remus axel-back system (similar to MPE exhasut) and IŽm really dissapointed. Sounds like stock exhaust, just a little lounder but not much really.
IŽm considering to remove the tiny mid-resonator and replace it with a straight pipe.
Will this improve the exhasut sound our will it just give me exhaust-drone?
Any ideas?
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      08-28-2017, 06:28 AM   #33
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It'll definitely increase the exhaust note with minimal drone. What will give a ton of drone is a muffler delete and a catless downpipe. Replace your midpipe and you should enjoy it.
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      08-28-2017, 08:28 AM   #34
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Quote:
Originally Posted by xantdieselx
Just installed the M2 lower (MPPK) airbox a few days ago and I love it. Got it from Turner Motorsports for around $200 shipped.

I like the fact that it's an OEM part and not a full on intake. I makes just enough sound IMO about 2x louder than stock. Definitely sounds more aggressive without being overly loud. Thank you for posting the part #. It was exactly what I was looking for.
It seems to me the only difference between the 235 and m2 part is that cutout. Do you think you could cut a hole in the stock air box where the m2 cutout is and get a similar result?
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      08-28-2017, 08:50 AM   #35
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Quote:
Originally Posted by TMatt View Post
It seems to me the only difference between the 235 and m2 part is that cutout. Do you think you could cut a hole in the stock air box where the m2 cutout is and get a similar result?
Yes you can do a cutout or a few smaller circles and it'll give you the added noise. Plenty of people on these forums have done that. Some like it, some don't, so might want to buy a second hand unit in case you want to revert back.
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      08-28-2017, 12:37 PM   #36
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Quote:
Originally Posted by aydeen View Post
Hi Guys,

Installed a Remus axel-back system (similar to MPE exhasut) and IŽm really dissapointed. Sounds like stock exhaust, just a little lounder but not much really.
IŽm considering to remove the tiny mid-resonator and replace it with a straight pipe.
Will this improve the exhasut sound our will it just give me exhaust-drone?
Any ideas?
Axle back with stock midpipe and stock DP will always sound mild.

I recommend you either get the REMUS midpipe or catless downpipe for a more aggressive sound
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      08-29-2017, 01:26 PM   #37
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Had my standard exhaust altered internally to be basically same as MPE one...heres link to the sound of mine on youtube.
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      08-29-2017, 06:02 PM   #38
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M2 muffler with quad tips cut off best route , add VRSF downpipe too but not necessary

I wouldn't worry about cutting the muffler off as thats how MPEs are installed and all the parts are OEM



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      08-30-2017, 08:57 AM   #39
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Quote:
Originally Posted by Anderw View Post
M2 muffler with quad tips cut off best route , add VRSF downpipe too but not necessary

I wouldn't worry about cutting the muffler off as thats how MPEs are installed and all the parts are OEM



cool sounds exactly like mine. But I just paid 250 pounds and the guy cut small section in backbox on mine, altered internals and re sealed. Bargain and hardly any messing around and looks stock underneath.
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      08-30-2017, 11:51 AM   #40
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Quote:
Originally Posted by leeadam View Post
Quote:
Originally Posted by Anderw View Post
M2 muffler with quad tips cut off best route , add VRSF downpipe too but not necessary

I wouldn't worry about cutting the muffler off as thats how MPEs are installed and all the parts are OEM



cool sounds exactly like mine. But I just paid 250 pounds and the guy cut small section in backbox on mine, altered internals and re sealed. Bargain and hardly any messing around and looks stock underneath.
I was interested in modifying a stock muffler myself, the m2 muffler ended up costing me $350 after buying the OEM MPE clamp though I could have had it welded on when I had the tips cut off , only thing I was weary about opening the stock muffler was doing all that work and not getting the result I wanted

Curious if you can open an m2 muffler and make it sound like an m2 MPE
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      08-31-2017, 03:29 AM   #41
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Quote:
Originally Posted by Anderw View Post
I was interested in modifying a stock muffler myself, the m2 muffler ended up costing me $350 after buying the OEM MPE clamp though I could have had it welded on when I had the tips cut off , only thing I was weary about opening the stock muffler was doing all that work and not getting the result I wanted

Curious if you can open an m2 muffler and make it sound like an m2 MPE
This guy i use is in uk of course http://www.exhaustmods.co.uk/
does many cars porsches and M3s etc. So i had heard how an m235 sounded before going ahead, it is kinda same as a MPE. nice pops on down shifts. I dont know if he’s done an M2 or not yet.
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      08-31-2017, 03:31 AM   #42
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Quote:
Originally Posted by Anderw View Post
I was interested in modifying a stock muffler myself, the m2 muffler ended up costing me $350 after buying the OEM MPE clamp though I could have had it welded on when I had the tips cut off , only thing I was weary about opening the stock muffler was doing all that work and not getting the result I wanted

Curious if you can open an m2 muffler and make it sound like an m2 MPE
mail him say Lee with m235 gave your details...he may have a video of an M2 or give advice even if you in USA.
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      08-31-2017, 06:11 AM   #43
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Quote:
Originally Posted by mike@x-ph.com View Post
Axle back with stock midpipe and stock DP will always sound mild.

I recommend you either get the REMUS midpipe or catless downpipe for a more aggressive sound
Damn these video-clips are not loyal. The axel-back remus sounds amazing on youtube but in reality it doesnŽt sound like that at all.

IŽll replace the resonator with a straight pipe... the shipping(incl taxes) is tooo expensive to send the midpipe to Sweden unfortuantely.

Thanks guys.
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      09-20-2017, 08:14 AM   #44
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Quote:
Originally Posted by aydeen View Post
Damn these video-clips are not loyal. The axel-back remus sounds amazing on youtube but in reality it doesnŽt sound like that at all.

IŽll replace the resonator with a straight pipe... the shipping(incl taxes) is tooo expensive to send the midpipe to Sweden unfortuantely.

Thanks guys.
Just have it cut out and welded, its like 800 SEK at decent shop.

I have res-delete and catless DP and live near you if you want to listen.. non-mpe muffler.

https://youtu.be/IpZCihJgm84

I made a clip, have a listen.
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