[///M2CS]

Originally Posted by kart driver

How do you avoid CEL? AK Motion unit? Or remap of ECU?

let's be careful ! the link pipe assembly and Ak Motion seems to work but the oxygen sensors are very sensitive
better to wait a bit I will tell you within a month if there is no error code

[bdogk]

Spray painted muffler. See before/after pics.

I did same on my previous Comp as well. Less than 1 hour job including masking. Really easy project.

[JPMD]

Nice job. What paint did you use?

[///M2CS]

Originally Posted by bdogk

Spray painted muffler. See before/after pics.

I did same on my previous Comp as well. Less than 1 hour job including masking. Really easy project.

Good job !

[bdogk]

Originally Posted by JPMD

Nice job. What paint did you use?

I used high-temp mat black spray paint for BBQ's.

I first wiped muffler with soap and water to remove any dirt or oil, then started car to dry and warm up muffler to lukewarm temp for paint to better adhere as air temp was only 8C deg here. After spray application, I started car again to promote paint drying.

Also, I used 2 sheets of cheap and thin painter's drop sheets you can get at the dollar store to mast the whole car prior to spraying.

On my Comp, I had paint on the muffler for 2 yrs and it never peeled or flaked even after numerous track days.

[JPMD]

^^^^^^^
Thank you

[Supadice]

can we get a sound clip please

[///M2CS]

Originally Posted by Supadice

can we get a sound clip please

I’ll dot it soon

[///M2CS]

why change the original exhaust? ?

the very muffled sound is the only real flaw of M2 CS

Because BMW has manufactured an exhaust according to strict standards

if BMW had had free rein it would certainly not have installed a large pot filled with glass wool !

not to mention that this unsightly exhaust seems to fall to the ground

[///M2CS]

[medphysdave]

I watched this morning. Thanks. Will there be and drive off videos or acceleration passes added later? Sounded good in my opinion.

[///M2CS]

Originally Posted by medphysdave

I watched this morning. Thanks. Will there be and drive off videos or acceleration passes added later? Sounded good in my opinion.

I think so

[///M2CS]

Originally Posted by kart driver

How do you avoid CEL? AK Motion unit? Or remap of ECU?

With the Evolution line Akrapovic to keep warranty : AK Motion is the only solution

no remap!

With Slip on Akrapovic no problem at all

[MATTY17CS]

Hey guys. I recently got my M2 CS. I'm thinking of putting on a Ak exhaust on it. My only concern is...
In normal comfort modes. Will the cabin be loud and drone like sound. I'm hoping it won't be as I have my 2 year old daughter in the car quite often.
Thanks.

[///M2CS]

Originally Posted by MATTY17CS

Hey guys. I recently got my M2 CS. I'm thinking of putting on a Ak exhaust on it. My only concern is...
In normal comfort modes. Will the cabin be loud and drone like sound. I'm hoping it won't be as I have my 2 year old daughter in the car quite often.
Thanks.

Don't worry
No drone !

[rcouchh]

Originally Posted by bdogk

I too miss the MPE on my '17 OG M2. When I got my Comp, I installed the AA mid-pipe and it improved the sound a little - louder and more pop. But in no way did it have the deep-throat sound of the MPE.

I swapped the OEM mid-pipe back in when I traded in the Comp. So now I'm left with the AA mid-pipe and I'm wondering whether it will fit on my CS. Visually, the Comp & CS exhaust look similar. Anyone know?

Why would it not fit? The M2C and M2CS are the same exact car..

[rcouchh]

Originally Posted by kepler

Not true. He’s asking because BMW tuned/modified the exhaust for the CS, but how it was modified is unclear.

Yes, the M2C and M2CS have identical engines and exhaust configurations. A slight difference in the muffler, tips or resonators doesn't change what aftermarket exhausts are compatible.

If the Akra exhaust is classified as fitting both M2C and M2CS, how is there any difference between the two?

[medphysdave]

Originally Posted by rcouchh

Why would it not fit? The M2C and M2CS are the same exact car..

I can't decide if you're trying to troll or if your attempt to help is just coming across negatively. My impression is that you're more interested in making proclamation that the C and CS are the same. Instead of being open to the potential that there might be subtle difference between the two that could cause owners to question fitment issues.

Answering a question with a question is not usually perceived as helpful. The statement you provided is blatantly false.

The language used to describe the CS exhaust is in line with the m-sport exhaust. The comp language does not seem to match this. However m-sport seems to be marketing language for exhausts with valved flaps and specific sound tuning. I believe the Comp has this equipment, but it isn't referenced with the same language as the M2CS, x3comp, x4comp, and m5comp. The M2CS for whatever reason received this new language. Probably needs to sound money to help justify the money requested for the privilege of ownership.

[bdogk]

Originally Posted by medphysdave

I can't decide if you're trying to troll or if your attempt to help is just coming across negatively. My impression is that you're more interested in making proclamation that the C and CS are the same. Instead of being open to the potential that there might be subtle difference between the two that could cause owners to question fitment issues.

Answering a question with a question is not usually perceived as helpful. The statement you provided is blatantly false.

The language used to describe the CS exhaust is in line with the m-sport exhaust. The comp language does not seem to match this. However m-sport seems to be marketing language for exhausts with valved flaps and specific sound tuning. I believe the Comp has this equipment, but it isn't referenced with the same language as the M2CS, x3comp, x4comp, and m5comp. The M2CS for whatever reason received this new language. Probably needs to sound money to help justify the money requested for the privilege of ownership.

I concur with "medphysdave". As I indicated, I'm coming from a Comp to a CS. Visually, the exhaust plumbing looks identical. But before I just go and cut the CS exhaust I just want to be absolutely sure. That's the purpose of my initial post here.

FYI, I also sent my inquiry to AA for them to answer. Their response so far was that they haven't seen a CS to date, so can't be certain it will fit.

[medphysdave]

I suspect the "exhaust tuning" is model specific manipulation of the exhaust flaps. Either position vs rpm and/or shape of the flap.

Tried to dive further into the m-sport exhaust. On the m5 it's a change toe the resonator in the midpipe. Visually indistinguishable from the non m-sport, but results in a loudness increase of 6dB to 14dB. That's significant. The point is that we can't be sure that there is no modification longer this on the CS. Especially when they use the m-sport exhaust marketing language.

https://f90.bimmerpost.com/forums/sh....php?t=1483135

Do not confuse m-sport exhaust with m-performance exhaust as they are different.

[EatYourHeartOut]

Is it true that the stock exhaust on the CS is quieter than the stock exhaust on the M2 Comp?

[GimmeanM]

Originally Posted by EatYourHeartOut

Is it true that the stock exhaust on the CS is quieter than the stock exhaust on the M2 Comp?

Yes, it's also true that it's tune is less powerful, has a harsher ride and is way more ugly to look at.