M4 Competition Package exhaust

M4 Competition Package exhaust

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Discussion

steakandchips

Original Poster:

212 posts

161 months

Wednesday 24th August 2016
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Hi,

Can't seem to find out for sure on the internet, but perhaps someone here knows... is the "M Sports Exhaust System" on the M4 CP exactly the same system as the M Performance exhaust system available through dealerships as an accessory for £3899 (with the carbon tips). If it is, I've driven an M4 with that exhaust and I'm not sure if it wasn't just a little too shouty.

Any M4 CP owners know if it's the same Akropovic system and if it is, do you ever think it's too loud?

S&C

st33ly

493 posts

146 months

Friday 26th August 2016
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Hi

It is not a system made by Akraprovic. Its a slight redesign of the original M3/4 system. Nothing fancy. Look at bimmerpost. They have a whole section on it.

Wills2

22,616 posts

174 months

Friday 26th August 2016
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Indeed the CP exhaust is NOT the MPE as the other poster said just a modified version of the standard exhaust.


bigtime

513 posts

138 months

Friday 26th August 2016
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As above. Same exhaust but doesn't sound as st.

Inverted

2,162 posts

208 months

Saturday 27th August 2016
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Yep the CP exhaust is different to the optional M performance exhaust. I believe its a half way between standard and the optional M exhaust.

And neither are made by Akra.

Wills2

22,616 posts

174 months

Saturday 27th August 2016
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Inverted said:
Yep the CP exhaust is different to the optional M performance exhaust. I believe its a half way between standard and the optional M exhaust.

And neither are made by Akra.
Not really the MPE is a completely different design with a titanium back box and is 8kg lighter the CP is a stock system with some minor internal modifications + software changes that change the way the valves work.

The MPE as you say isn't made by Akra apparently it's made by Prototechnik.

foresterlad

218 posts

184 months

Saturday 27th August 2016
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When I collected my M3 CP the resident dealership genius thought it had the MPE fitted so there is quite a bit of mis-information not helped by some press reports. I found the CP exhaust sounds better than my previous M4 on cold and subsequent start up and there are pops and bangs on over run if you like that sort of thing. Best mod for me is disconnecting the HK speakers from the amplified engine noise which was always annoying and artificial.

Dazza N

300 posts

148 months

Sunday 4th September 2016
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Just got my M4 CP and it sounds lovely. Not too shouty. As you guys mention it's hard to get exact details of which exhaust is fitted.

Wills2

22,616 posts

174 months

Sunday 4th September 2016
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No it isn't hard at all, pretty straight forward apart from some people thinking they've got an MPE for free as part of the CP which they haven't.


jimbooo

334 posts

186 months

Monday 5th September 2016
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ive got the MPE on my non comp pack M4, ive compared it to the comp pack exhaust with a friends car and mine is certainly way louder in all throttle modes. the comp pack does have a different set up in terms of the burble/overrun i believe coming from the ECU. when they fit an MPE to a non comp M3/4 there is no ecu reprogramming that will effect the sound, overrun or any of that. if anything its just a reset to ensure the valves work with it etc..

i have to say it was the best mod ive done to the car, transforms it from quiet, farty exhaust note to something that turns heads wherever you drive. If you like that sort of thing! unplug the active sound module from the amp and add a cg precision valve controller and its just insane.

cosworth330

1,299 posts

236 months

Sunday 6th August 2017
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Is a CP exhaust a straight bolt on for a non CP car? Sometimes see them for sale on eBay with very few miles.

Wills2

22,616 posts

174 months

Sunday 6th August 2017
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cosworth330 said:
Is a CP exhaust a straight bolt on for a non CP car? Sometimes see them for sale on eBay with very few miles.
Yes.

JMBMWM5

2,281 posts

197 months

Sunday 6th August 2017
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foresterlad said:
When I collected my M3 CP the resident dealership genius thought it had the MPE fitted so there is quite a bit of mis-information not helped by some press reports. I found the CP exhaust sounds better than my previous M4 on cold and subsequent start up and there are pops and bangs on over run if you like that sort of thing. Best mod for me is disconnecting the HK speakers from the amplified engine noise which was always annoying and artificial.
I agree I did the same, disconnected the Active Sound, and insulated the boot under floor, makes the car sound great , and you can hear music when you want too.

Thermobaric

725 posts

119 months

Sunday 6th August 2017
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Is there no mod for the standard exhaust to make it sound like the CP exhaust if it's only slightly modified? Like the PE mod for the E9x M3s.

Wills2

22,616 posts

174 months

Sunday 6th August 2017
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Thermobaric said:
Is there no mod for the standard exhaust to make it sound like the CP exhaust if it's only slightly modified? Like the PE mod for the E9x M3s.
The software is different as well.

steakandchips

Original Poster:

212 posts

161 months

Sunday 6th August 2017
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JMBMWM5 said:
agree I did the same, disconnected the Active Sound, and insulated the boot under floor, makes the car sound great , and you can hear music when you want too.
I bet the answer to this question is all over PH, but is disconnecting the engine sound an easy thing to do?

cosworth330

1,299 posts

236 months

Sunday 6th August 2017
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Theirs a video on YouTube that shows you how to disconnect it. Remove drivers side boot trim and unplug grey block connector. Looks like it might take about 30 mins.

JMBMWM5

2,281 posts

197 months

Sunday 6th August 2017
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steakandchips said:
I bet the answer to this question is all over PH, but is disconnecting the engine sound an easy thing to do?
I unplugged the module which is in the L/Hand corner of the boot under the light cluster.
I cut a flap in the side lining just below the lights to get in and out easy, you can not even see where I did it.