Akrapovic Exhaust System Stainless Headers on a Gen II

[Gazk]

Has anyone fitted Akrapovic Exhaust System Stainless Headers Carbon "Muffler"\ end can BMW S1000XR TE 2021 EG: Gen 2?

I'm also looking at fitting a K&N as well.

If you have fitted both or more so the exhaust, did you get the bike remapped?

[Hugg727]

Yes I did, well sort of.....

I had the Akra can and I matched it up to the Black Widow headers, which are far less money.  It ran ok but eventually I did a Stage 2 remap with Brentune.  This transformed the bike IMHO.

I also added the Sprint airfilter.  Within the BT remap you can ask them to keep the flaps on the airbox open. I think the combination of this and by moving the temperature sensor to the front of the air intake, instead of right next to the motor, allows the bike to do a better job of calculating the mixture.  Moving the sensor isnt necessarily difficult but it does require you to take the tank off of the bike.  Plenty of videos on YT or the BT webiste.

[CaptainSkinnyArms]

Like the poster above me I too fitted the Black Widow headers but I kept the stock can.  I did ride it a little without a tune but it didn't seem to like it very much.  After a Stage 2 BT it ran great. I stayed with the stock air filter because I heard not the best things about the aftermarket filters if you live in a dusty/desert environment.

[Gazk]

Thank you both I am looking at the Black Widow headers as well, like you say a lot cheaper.

By the sounds of things, a stage 2 tune is in order.

As it's not long before the dark nights start to come in this is a winter project.

[Winger]

I’d fit a Power Commander and phone RRP in Meriden their not far from you and they’ll custom map it,all PC’s come with a custom map anyway but no two bikes are the same and not only they have the fuelling too alter because of all the crap you have taken off exhaust wise,they have to fill the TUV hole in hence why the motor picks up so much better,you’ll have gotten rid of the lamba sensor disappearing up its backside trying to fix the impossible.

[esso_sa]

Originally Posted by Gazk

Has anyone fitted Akrapovic Exhaust System Stainless Headers Carbon "Muffler"\ end can BMW S1000XR TE 2021 EG: Gen 2?

I'm also looking at fitting a K&N as well.

If you have fitted both or more so the exhaust, did you get the bike remapped?

I did. Akrapovic SS headers in combination with Akrapovic carbon end can, factory tune (no remap).
Bike ran fine. No hesitation, even at low rpm’s and light throttle load.
It felt much stronger in midrange, especially between 5000-7000 rpm’s.
Fuel consumption went slightly up, which means that the stock ECU is obviously adding more fuel due to increased exhaust flow.
But…. In the end I went back to stock. Not due to any driveability problems (that was completely fine) but due to the noise - it was too loud for my taste, unbearable to ride more than 30 minutes without earplugs. And I travel a lot…
Now I run stock headers with Akra carbon can and with exhaust flap disabled (always open).
But I’m reconsidering to go back to Akra headers again, but this time fit the db killer to dampen the noise to a more tolerable level. Bike simply looks much nicer without that ugly box under, and the heat hitting the legs at slow speeds is also gone with headers

[Hugg727]

Originally Posted by esso_sa

I did. Akrapovic SS headers in combination with Akrapovic carbon end can, factory tune (no remap).
Bike ran fine. No hesitation, even at low rpm’s and light throttle load.
It felt much stronger in midrange, especially between 5000-7000 rpm’s.
Fuel consumption went slightly up, which means that the stock ECU is obviously adding more fuel due to increased exhaust flow.
But…. In the end I went back to stock. Not due to any driveability problems (that was completely fine) but due to the noise - it was too loud for my taste, unbearable to ride more than 30 minutes without earplugs. And I travel a lot…
Now I run stock headers with Akra carbon can and with exhaust flap disabled (always open).
But I’m reconsidering to go back to Akra headers again, but this time fit the db killer to dampen the noise to a more tolerable level. Bike simply looks much nicer without that ugly box under, and the heat hitting the legs at slow speeds is also gone with headers

I had a similar experience with the Black Widow headers paired with the BMW HP Akra can.  I eventually found the proper DB killer insert (BMW part #) and now enjoy far less noise.

[RichieRich]

Originally Posted by Winger

I’d fit a Power Commander and phone RRP in Meriden their not far from you and they’ll custom map it,all PC’s come with a custom map anyway but no two bikes are the same and not only they have the fuelling too alter because of all the crap you have taken off exhaust wise,they have to fill the TUV hole in hence why the motor picks up so much better,you’ll have gotten rid of the lamba sensor disappearing up its backside trying to fix the impossible.

Though I have a Gen1, that is where I'm at. All these ECU flash tunes are great cookie cutter tunes, but how does that tune work for a bike in high elevation vs low elevation? What about humidity?

I live in the US (San Diego to be exact) and it's hard to find someone that can do a dyno tune. Some even say get a BrenTune and PC5 so I can take advantage of everything. But that's going to be about $2000 USD. I'm hoping to find someone that has a Woolich setup that can access all the above without me needing to buy a hand held and PC5.

[CaptainSkinnyArms]

Originally Posted by esso_sa

I did. Akrapovic SS headers in combination with Akrapovic carbon end can, factory tune (no remap).
Bike ran fine. No hesitation, even at low rpm’s and light throttle load.
It felt much stronger in midrange, especially between 5000-7000 rpm’s.
Fuel consumption went slightly up, which means that the stock ECU is obviously adding more fuel due to increased exhaust flow.
But…. In the end I went back to stock. Not due to any driveability problems (that was completely fine) but due to the noise - it was too loud for my taste, unbearable to ride more than 30 minutes without earplugs. And I travel a lot…
Now I run stock headers with Akra carbon can and with exhaust flap disabled (always open).
But I’m reconsidering to go back to Akra headers again, but this time fit the db killer to dampen the noise to a more tolerable level. Bike simply looks much nicer without that ugly box under, and the heat hitting the legs at slow speeds is also gone with headers

That was the biggest benefit for removing the heat sink breadbox. The bike no longer roasts my left leg in traffic and speeds below 40mph.  Having the stock can on with the BW headers aren't too bad sound wise for me because I wear ear plugs 95% of the time anyways.