Akrapovic slip-on on M2C - disappointment on sound

WebberPT · 07-22-2020, 11:47 AM

Quote:

Originally Posted by kart driver

Does anybody have any experience with MPE installed on M2C with OPF?

If the sound is really great, I will most likely go for it regardless of the unreasonably high price for it.

I'm looking into this as well as I will have the same issue wi the regulations and emissions, meaning: I will have to meet them.

MPE might be the safest option, however, it's hard to find data/reviews/videos comparing it to its competitors

Kankles · 07-22-2020, 02:02 PM

Another person mentioned the Dinan w x-pipe earlier. This keeps the secondary cats (US) or OPF (EU) so no coding needed.

EC approval? Hell no as you have to order from US.

I have just got a cracking deal from X-PH through this forum and will give it a go on my EU/OPF car.

3t3p · 07-22-2020, 04:06 PM

N55 retrofit?:0

kart driver · 07-22-2020, 05:41 PM

Quote:

Originally Posted by Kankles

Another person mentioned the Dinan w x-pipe earlier. This keeps the secondary cats (US) or OPF (EU) so no coding needed.

EC approval? Hell no as you have to order from US.

I have just got a cracking deal from X-PH through this forum and will give it a go on my EU/OPF car.

I can order the MPE through my BMW dealer. Although they say they can’t install it but they can order it for me.

WebberPT · 07-23-2020, 08:37 AM

Quote:

Originally Posted by kart driver

Quote:

Originally Posted by Kankles

Another person mentioned the Dinan w x-pipe earlier. This keeps the secondary cats (US) or OPF (EU) so no coding needed.

EC approval? Hell no as you have to order from US.

I have just got a cracking deal from X-PH through this forum and will give it a go on my EU/OPF car.

I can order the MPE through my BMW dealer. Although they say they can’t install it but they can order it for me.

Wait what? A BMW dealer won't install a BMW M Performance part? I'm shocked

DriverDaily · 07-23-2020, 08:51 AM

I would try to hear the Remus in person.

They are using helmholtz resonators to target specific frequencies and cancel them out. I don't know if they are targeting high frequency rasp, low frequency drone, or both.

CSL335i · 07-23-2020, 10:38 AM

Quote:

Originally Posted by DriverDaily

I would try to hear the Remus in person.

They are using helmholtz resonators to target specific frequencies and cancel them out. I don't know if they are targeting high frequency rasp, low frequency drone, or both.

That is the point. If OP wants to keep the OPF, than Remus Race is the winner.

With my friend we custom made an axle-back exhaust with two Helmholtz resonator (the same design as Remus Race, but for less money :-)).
We kept OPFs and factory resonators in place as well and integrated the factory exhaust valves as well.
Sounds very-very good and no CELL.

A little bit drone during the cold start up (but only within the first 3 or 4 seconds...)

Akra is an overpriced exhaust axle-back system for M2C with OPF. Not worth it and does not sound significantly better than factory exhaust for that money. On my recent F13 M6 i had Akra, that was a good system with good sound...

Laszlo

kart driver · 07-23-2020, 12:44 PM

Quote:

Originally Posted by WebberPT

Wait what? A BMW dealer won't install a BMW M Performance part? I'm shocked

Because MPE is not meant to be installed on M2C with OPF.
MPE can be installed only on the car without those filters

M2 GT · 07-24-2020, 07:31 PM

The linkpipe is really what makes it sound good. I have the linkpipe with the slip on and it's the perfect amount of sound personally. Too bad it's not allowed in Europe...

ebisu8 · 07-24-2020, 07:44 PM

Quote:

Originally Posted by M2 GT

The linkpipe is really what makes it sound good. I have the linkpipe with the slip on and it's the perfect amount of sound personally. Too bad it's not allowed in Europe...

Love this. I plan on the full Akrapovic kit & caboodle DP -> Link Pipe -> Slip for max

j0oftheworld · 07-24-2020, 07:45 PM

Valved exhaust will never sound good.. period
The muffler is there to make it quiet vs tuning the sound and the valves just open up to straight pipe.
You're using about $100 worth of pipe on your $5,000 exhaust. Talk about scam of the century! lol

clutchdj · 07-24-2020, 09:50 PM

I have the full akra, mid pipes and rear section. It drones at 2950 rpms mostly because it’s a hatchback, but man above that at track speeds the pitch is perfect. Fitment is always perfect with akra and it never hits the underbody. I honestly think the akra sounds more refined (in the cabin) in the f80 compared to my m2c but it’s oranges vs apple when it comes to the platform.

NathObeaN · 07-25-2020, 12:54 AM

Quote:

Originally Posted by M2 GT

The linkpipe is really what makes it sound good. I have the linkpipe with the slip on and it's the perfect amount of sound personally. Too bad it's not allowed in Europe...

Thanks goodness that's one thing we can install in UK... well, resonator delete at least - stops at OPF.

TimRPryor · 07-26-2020, 10:03 AM

I have the slip on with my M2C (S55) and have been considering using the midpipe as well, but I keep hearing I will have to "code" out a CEL to use it - has that been any one else's experience?

Not sure what effect the coding would have on yearly inspections around here...

Any comments are appreciated and welcomed.

yaymitch · 07-26-2020, 10:57 AM

Quote:

Originally Posted by TimRPryor

I have the slip on with my M2C (S55) and have been considering using the midpipe as well, but I keep hearing I will have to "code" out a CEL to use it - has that been any one else's experience?

Not sure what effect the coding would have on yearly inspections around here...

Any comments are appreciated and welcomed.

I had the Akra Evo (which includes midpipe) system on my F80. Live in Houston. Never had any issues with inspection or CEL. Also, checked with dealer and they said all was good as far as warranty. Planning to get the same setup on my M2C.

Detoxified · 07-26-2020, 11:57 AM

Have you considered Active Autowerke Full Signature exhaust? I personally love mine.

ki__ · 07-26-2020, 12:27 PM

Has anyone without OPF tried the Akrapovic Slip-On and had a similar experience?

M2 GT · 07-26-2020, 12:30 PM

No CEL with the linkpipe, that's only if you add the downpipe.

Quote:

Originally Posted by TimRPryor

I have the slip on with my M2C (S55) and have been considering using the midpipe as well, but I keep hearing I will have to "code" out a CEL to use it - has that been any one else's experience?

Not sure what effect the coding would have on yearly inspections around here...

Any comments are appreciated and welcomed.

kart driver · 07-29-2020, 06:52 AM

Quote:

Originally Posted by ki__

Has anyone without OPF tried the Akrapovic Slip-On and had a similar experience?

The Akra slip-on, which I heard in person, was on a car without OPF.

Westerwälder · 08-18-2020, 03:16 PM

Have a look at a Lightweight Performance OPF-back exhaust system. It is the legally loudest system available here in Germany, even louder than the Akra Slip-On, because the LW system has a mid resonator delete.
But in terms of bmw warranty: every modification on the exhaust system will deny warranty claims.

kart driver · 08-19-2020, 12:07 PM

Quote:

Originally Posted by Westerwälder

Have a look at a Lightweight Performance OPF-back exhaust system. It is the legally loudest system available here in Germany, even louder than the Akra Slip-On, because the LW system has a mid resonator delete.
But in terms of bmw warranty: every modification on the exhaust system will deny warranty claims.

But how can anyone deny warranty claim if it is just an rear muffler change to aftermarket? All the OEM cats, OPFs and the central resonator are in place.

Westerwälder · 08-19-2020, 02:36 PM

It is an official statement by munich which has been sent to all dealers. Every modification on the complete exhaust system will be flagged in their system and MAY result in the denial of an exhaust related fault (such as turbo and so on...). Reason was the potentially missing back pressure of the exhaust and therefore a faulty operating OPF, for example.

07-22-2020, 02:02 PM	#24
Kankles Rear Admiral 1486 Rep 1,706 Posts Drives: Bavarian Milk Wagon Join Date: Jun 2012 Location: € iTrader: (1) Garage List 2019 BMW M2C [0.00]	Another person mentioned the Dinan w x-pipe earlier. This keeps the secondary cats (US) or OPF (EU) so no coding needed. EC approval? Hell no as you have to order from US. I have just got a cracking deal from X-PH through this forum and will give it a go on my EU/OPF car.
	Appreciate 0 Quote

07-22-2020, 04:06 PM	#25
3t3p Major 455 Rep 1,389 Posts Drives: M2 Join Date: May 2018 Location: NZ iTrader: (0)	N55 retrofit?:0
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07-23-2020, 08:51 AM	#28
DriverDaily Private First Class 228 Rep 198 Posts Drives: M2 Competition Join Date: Sep 2019 Location: Texas iTrader: (5)	I would try to hear the Remus in person. They are using helmholtz resonators to target specific frequencies and cancel them out. I don't know if they are targeting high frequency rasp, low frequency drone, or both.
	Appreciate 0 Quote

07-24-2020, 07:31 PM	#31
M2 GT Private First Class 67 Rep 88 Posts Drives: M2C Join Date: Nov 2019 Location: US iTrader: (0)	The linkpipe is really what makes it sound good. I have the linkpipe with the slip on and it's the perfect amount of sound personally. Too bad it's not allowed in Europe...
	Appreciate 2 ebisu81079.50 yaymitch945.50 Quote

07-24-2020, 07:45 PM	#33
j0oftheworld Private First Class 109 Rep 132 Posts Drives: 01 S2k, 20 M2C Join Date: Apr 2020 Location: PHX, AZ iTrader: (1)	Valved exhaust will never sound good.. period The muffler is there to make it quiet vs tuning the sound and the valves just open up to straight pipe. You're using about $100 worth of pipe on your $5,000 exhaust. Talk about scam of the century! lol
	Appreciate 0 Quote

07-24-2020, 09:50 PM	#34
clutchdj Colonel 1887 Rep 2,400 Posts Drives: a few cars Join Date: May 2015 Location: NY iTrader: (6)	I have the full akra, mid pipes and rear section. It drones at 2950 rpms mostly because it’s a hatchback, but man above that at track speeds the pitch is perfect. Fitment is always perfect with akra and it never hits the underbody. I honestly think the akra sounds more refined (in the cabin) in the f80 compared to my m2c but it’s oranges vs apple when it comes to the platform.
	Appreciate 1 yaymitch945.50 Quote

07-26-2020, 10:03 AM	#36
TimRPryor New Member 25 Rep 8 Posts Drives: F87 M2 Competition Join Date: Jul 2020 Location: Houston, TX iTrader: (0)	Akrapovic Slip On I have the slip on with my M2C (S55) and have been considering using the midpipe as well, but I keep hearing I will have to "code" out a CEL to use it - has that been any one else's experience? Not sure what effect the coding would have on yearly inspections around here... Any comments are appreciated and welcomed.
	Appreciate 0 Quote

07-26-2020, 11:57 AM	#38
Detoxified Second Lieutenant 205 Rep 269 Posts Drives: M2C HS Join Date: Jun 2019 Location: SoCal iTrader: (1)	Have you considered Active Autowerke Full Signature exhaust? I personally love mine.
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07-26-2020, 12:27 PM	#39
ki__ Brigadier General 409 Rep 3,479 Posts Drives: 19 M2C 6MT Join Date: May 2008 Location: Los Angeles, CA iTrader: (6) Garage List 2019 BMW F87 M2C [0.00]	Has anyone without OPF tried the Akrapovic Slip-On and had a similar experience?
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08-18-2020, 03:16 PM	#42
Westerwälder Private 14 Rep 52 Posts Drives: BMW F87 M2c Join Date: Jul 2016 Location: Germany iTrader: (0)	Have a look at a Lightweight Performance OPF-back exhaust system. It is the legally loudest system available here in Germany, even louder than the Akra Slip-On, because the LW system has a mid resonator delete. But in terms of bmw warranty: every modification on the exhaust system will deny warranty claims.
	Appreciate 0 Quote

08-19-2020, 02:36 PM	#44
Westerwälder Private 14 Rep 52 Posts Drives: BMW F87 M2c Join Date: Jul 2016 Location: Germany iTrader: (0)	It is an official statement by munich which has been sent to all dealers. Every modification on the complete exhaust system will be flagged in their system and MAY result in the denial of an exhaust related fault (such as turbo and so on...). Reason was the potentially missing back pressure of the exhaust and therefore a faulty operating OPF, for example.
	Appreciate 0 Quote