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      08-25-2018, 10:39 PM   #23
windtendo
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Quote:
Originally Posted by M5speed View Post
11 hp & 16 tq gains with Akra. Im quite pumped. Mine will arrive in about a week or two. Theres just something about having a performance car and being able to hear it. Growing up, it was half the fun of having a fast ride.

There some type of module that is supposed to allow your phone to adjust the sound also, which should be interesting.
Don’t let the gains be the reason to purchase though. On a car this heavy and already powerful, those figures will be imperceptible.

Also, I think you’re referring to the sound kit they offer for another $500-600ish... I’m not quite sure what this would do that the exhaust valve button doesn’t already do (open/close exhaust valves). Would love for someone to chime in on this.
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      08-26-2018, 07:46 AM   #24
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Very minor gains, but at least not flat or losing power. With it being titanium, it should allow for less thickness and a more aggressive sound.

More info on it here https://www.bmwblog.com/2018/07/10/w...he-bmw-m5-f90/
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      08-26-2018, 09:05 AM   #25
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Quote:
Originally Posted by windtendo View Post
Quote:
Originally Posted by M5speed View Post
11 hp & 16 tq gains with Akra. Im quite pumped. Mine will arrive in about a week or two. Theres just something about having a performance car and being able to hear it. Growing up, it was half the fun of having a fast ride.

There some type of module that is supposed to allow your phone to adjust the sound also, which should be interesting.
Don't let the gains be the reason to purchase though. On a car this heavy and already powerful, those figures will be imperceptible.

Also, I think you're referring to the sound kit they offer for another $500-600ish... I'm not quite sure what this would do that the exhaust valve button doesn't already do (open/close exhaust valves). Would love for someone to chime in on this.
^^^this ... ^^^^ Exhausts on these cars is about tone and sound; no perceptible performance gains. I have AKRA on my current F10 M5 and love it; really changed the personality of the car.

I ordered Comp M5 so I'll see how the exhaust sounds before making a decision.
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GONE: 15' F10 M5|BSM|BLACK|VELOS VSS-S2|KW|AKRA|IND|CF |ESCORT 360|VELOS PIGGY
GONE: 13' F10 M5|SG|BLACK|AKRA|KW|IND
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      08-26-2018, 09:15 AM   #26
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Love the Akra on my F85. Would buy it again in a heartbeat. Crazy easy install due to the high quality. Sound is 1000% better than stock. Akra claimed 10-15 hp gain. Gained zero. Would still buy it again. Killer exhaust. Knocked about 30lbs off the F85.
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      09-23-2018, 08:23 PM   #27
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https://f90.bimmerpost.com/forums/sh....php?t=1524644
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      09-23-2018, 08:24 PM   #28
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      09-27-2018, 09:51 AM   #29
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Quote:
Originally Posted by windtendo View Post
Don’t let the gains be the reason to purchase though. On a car this heavy and already powerful, those figures will be imperceptible.

Also, I think you’re referring to the sound kit they offer for another $500-600ish... I’m not quite sure what this would do that the exhaust valve button doesn’t already do (open/close exhaust valves). Would love for someone to chime in on this.
Open/Close button in M5 is kinda stupid, from BMW car instruction you can read that it opens valves , but they operate ( open / close ) depending on drive mode ( sport+ is the only really open valve mode ), speed and current rpm.
Per m5 f90 technical instruction:


I'm getting my Akrapovic installed on wednesday without soundkit as my bmw contact told me the button in m5 dashboard will do the work.



However, from akrapovic sound kit instruction ( Instruction precisely for M5 ) they write about exhaust being in ADAPTIVE MODE ( Same as BMW so drive mode, speed, rpm ) or RACE MODE ( Fully opened valves all the time )

link to instruction (pages 12/13):
https://d1sfhav1wboke3.cloudfront.ne...a53123d717.pdf


So this just builds up more confusion lol

Last edited by jjjjjjjjjjjjj; 09-27-2018 at 09:58 AM.. Reason: added links to instructions
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      12-28-2018, 09:28 AM   #30
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      12-28-2018, 10:48 AM   #31
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Dinan is my favorite so far
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      12-29-2018, 12:49 PM   #32
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Quote:
Originally Posted by Hunter399 View Post
Dinan is my favorite so far
I was surprised to hear nothing about that Dinan!
While not a big fan of the company but seems to be cheapest option and from videos it’s a very nice notice!!

Thoughts?!
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      12-29-2018, 11:00 PM   #33
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Quote:
Originally Posted by soooma View Post
Quote:
Originally Posted by Hunter399 View Post
Dinan is my favorite so far
I was surprised to hear nothing about that Dinan!
While not a big fan of the company but seems to be cheapest option and from videos it’s a very nice notice!!

Thoughts?!
I already ordered it. I'll post videos when I get it hopefully in the next 2 weeks
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      12-30-2018, 04:04 AM   #34
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Quote:
Originally Posted by Hunter399 View Post
Quote:
Originally Posted by soooma View Post
Quote:
Originally Posted by Hunter399 View Post
Dinan is my favorite so far
I was surprised to hear nothing about that Dinan!
While not a big fan of the company but seems to be cheapest option and from videos it's a very nice notice!!

Thoughts?!
I already ordered it. I'll post videos when I get it hopefully in the next 2 weeks
Congrats
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      12-31-2018, 08:40 AM   #35
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@onfireX5 didn't see this posted yet
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      12-31-2018, 09:04 AM   #36
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@onfireX5 didn't see this posted yet
Excellent ! Keep them coming !
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      01-03-2019, 06:30 AM   #37
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got the ipe on my f10 and they are great... for my taste the best sound for now, waiting for RPI final exhaust.
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      01-03-2019, 07:47 AM   #38
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Quote:
Originally Posted by Hunter399 View Post
Quote:
Originally Posted by soooma View Post
Quote:
Originally Posted by Hunter399 View Post
Dinan is my favorite so far
I was surprised to hear nothing about that Dinan!
While not a big fan of the company but seems to be cheapest option and from videos it's a very nice notice!!

Thoughts?!
I already ordered it. I'll post videos when I get it hopefully in the next 2 weeks
Requires cutting?!
How do you feel about that?
Got a lease here
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      01-06-2019, 08:38 PM   #39
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Remus cat-back sneak preview, full review and video coming soon!

This is the production system.

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      01-07-2019, 10:51 AM   #40
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Remus cat-back sneak preview, full review and video coming soon!

This is the production system.
Sounds good
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      01-07-2019, 01:01 PM   #41
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The RPi valved F90 M5 Exhaust
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      01-07-2019, 03:03 PM   #42
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      01-18-2019, 12:09 PM   #43
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      02-07-2019, 05:39 AM   #44
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The RPi has just been released and in stock now!!

Axle Back
http://www.bimmerzone.com/BMW_Perfor...-GTM-AXLE.html

Full
http://www.bimmerzone.com/BMW_Perfor...-GTM-FULL.html
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