Akrapovic Evolution Exhaust System

[Akara1]

Ralf, I look forward to meeting you in L.A. For those of you interested in this exhaust, I can highly recommend Ralf as your source. Drop him a line if you need anything: info@krenzer-performance-parts.com

Originally Posted by sard

So the exhaust has a bronze/golden hint of color? I believe aworkx said over time it will become more of a golden color? If this is the case...it's one of the only reasons that would sway me from getting this exhaust.

In my experience with Akrapovic Titanium exhausts on my bikes, if they are properly maintained, the parts that are subjected to higher levels of heat will start to turn blue. If you leave finger prints on them, those parts will probably turn bronze. Best way to keep them clean is to wipe them down with a rag sprayed with some WD-40. As long as you do this, it should not turn bronze. Don't know how far you are from the L.A. area, but you can check mine out if you'd like to see it in person.

And mike, don't be afraid to be the odd one out. Most of the sportbike world pronounces it incorrectly...

[mikewads]

Originally Posted by Akara1

In my experience with Akrapovic Titanium exhausts on my bikes, if they are properly maintained, the parts that are subjected to higher levels of heat will start to turn blue.

You can see in the below video that as the exhaust heats up the pipes turn blue (1 minute into the video).

[FStop7]

Do they sell the X-pipe separately? Will it fit other exhausts?

[Ca$hOnly]

I'm not feeling those clamps around the tips...why don't they just weld them on?

[sard]

Thanks for the feedback!

Originally Posted by Akara1

Ralf, I look forward to meeting you in L.A. For those of you interested in this exhaust, I can highly recommend Ralf as your source. Drop him a line if you need anything: info@krenzer-performance-parts.com



In my experience with Akrapovic Titanium exhausts on my bikes, if they are properly maintained, the parts that are subjected to higher levels of heat will start to turn blue. If you leave finger prints on them, those parts will probably turn bronze. Best way to keep them clean is to wipe them down with a rag sprayed with some WD-40. As long as you do this, it should not turn bronze. Don't know how far you are from the L.A. area, but you can check mine out if you'd like to see it in person.

And mike, don't be afraid to be the odd one out. Most of the sportbike world pronounces it incorrectly...

[gr8000]

Originally Posted by Ca$hOnly

I'm not feeling those clamps around the tips...why don't they just weld them on?

Exactly!

[FStop7]

Originally Posted by Ca$hOnly

I'm not feeling those clamps around the tips...why don't they just weld them on?

So the tips can be adjust to fit either the E90 or the E92?

[mikewads]

Originally Posted by FStop7

So the tips can be adjust to fit either the E90 or the E92?

That is correct.

Originally Posted by FStop7

Do they sell the X-pipe separately? Will it fit other exhausts?

No. Just the complete header back system or axle back system.

[Checkcaptain]

Originally Posted by FStop7

Do they sell the X-pipe separately? Will it fit other exhausts?

That is a frequent question and that is the reason I was asking Akrapovic to offer this option. Unfortunately they are not willing to offer the header back part excluding the muffler, even they could sell a lot of them. Reason is, they do not want to support other manufacturer who are just offering axle back systems. The Akrapovic system is well designed and sophisticated, so that you can just chose between axle back or header back system. Here is a link of the construction manual:

http://shop.akrapovic.de/pdf/NAV-430...92,93)%20B.pdf


, so that you get an idea, why it is "normally" not possible to just go for the X-pipe. Page 9 shows the stock exhaust with clamps, page 21 shows the axle back with clamps how it goes to the Evolution X-pipe, page 22 shows the axle back with clamps and tube adapters how it goes to the stock X-pipe, page 25 shows how axle back and Evolution X-pipe are connected, page 26 shows how axle back and stock X-pipe are connected. So you will find out that tube adapter and Evolution X-pipe have the same diameter. That is the reason for not being able to just put it the other way around.
The only chance is to weld the tube adapter to the Evolution X-pipe.
So you will be able to use it

[Akara1]

I installed my Akrapovic Evolution Exhaust system yesterday at Gintani and also did some before and after Dynos. The only mod to the car before the exhaust was an AA air filter. Overall, I am very happy with this exhaust. The sound is perfect for my taste, and the quality of the exhaust is amazing. Thanks to the guys at Gintani for their great work.

Here is the dyno chart:



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[McLuVan]

sick gains

[FStop7]

What gear were you dynoing in? That was very short.

[Checkcaptain]

Originally Posted by Akara1

I installed my Akrapovic Evolution Exhaust system yesterday at Gintani and also did some before and after Dynos. The only mod to the car before the exhaust was an AA air filter. Overall, I am very happy with this exhaust. The sound is perfect for my taste, and the quality of the exhaust is amazing. Thanks to the guys at Gintani for their great work.

Here is the dyno chart:



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Ara, congrats on that result! That is pretty much the same that we are used from our European customers: ~ 5% horsepower-gain and ~ 10% torque-gain matches the other results! I guess you are the first who dynoed the Akra in the US...

For all, who do not like the tips - I am in contact with Akrapovic for a special edition of the tips - like shown in the picture. But I need some feedback from you guys: info@krenzer-performance-parts.com

[mikewads]

Originally Posted by Akara1

I installed my Akrapovic Evolution Exhaust system yesterday at Gintani and also did some before and after Dynos. The only mod to the car before the exhaust was an AA air filter. Overall, I am very happy with this exhaust. The sound is perfect for my taste, and the quality of the exhaust is amazing. Thanks to the guys at Gintani for their great work.

Thanks for sharing the video! It's great to see the before and after result of the exhaust on a basically stock M3. What did the guys over at Gintani have to say about the exhaust?

Originally Posted by Checkcaptain

Ara, congrats on that result! That is pretty much the same that we are used from our European customers: ~ 5% horsepower-gain and ~ 10% torque-gain matches the other results! I guess you are the first who dynoed the Akra in the US...

For all, who do not like the tips - I am in contact with Akrapovic for a special edition of the tips - like shown in the picture. But I need some feedback from you guys: info@krenzer-performance-parts.com

I do like those tips better!
I assume they use the same style clamps on the bottom?

[MyKmYk]

Originally Posted by mikewads

I do like those tips better!
I assume they use the same style clamps on the bottom?

Those tips are 100mm vs. 90mm for the standard titanium. They could fit the exhaust, but it is my understanding that it would have to be slightly modified to make it fit. I would definately consider this option, but I don't know how difficult it would be to do this. Would the fact that the system is titanium present any challenges for a muffler shop?

[Akara1]

The guys at Gintani really liked the exhaust as well. I have to say though, if you like loud, their exhaust is absolutely amazing. The dyno runs were done in 4th gear.

[APEPerformance.com]

This exhaust is one of my favorites for the M3. With it being on the new GT4, it also shows what BMW thinks of it too

[MyKmYk]

Originally Posted by Akara1

The guys at Gintani really liked the exhaust as well. I have to say though, if you like loud, their exhaust is absolutely amazing. The dyno runs were done in 4th gear.

Are you saying the Akra is loud, or the Gintani is loud?

[Akara1]

The Gintani full exhaust is the one I am referring to. The Akra is not too loud at all IMO. I posted a video of a dyno run with the full Gintani exhaust here:

http://www.m3post.com/forums/showthread.php?t=255635

[BMW-Motorsport]

I also got my header back system from Ralf. Very good job, it took just 4 days to receive it. I like the sound and even can feel the torque improvement, its just awesome...

[JC919]

I really like those tips!

[Akara1]

Here are a few pics of the exhaust installed: