Full Akrapovic Added

[Loady1]

Just wondering about other owners engine performance. I added Akrapovic slip on for sound. Wasn’t looking for more performance and not considering the headers. While in for a service I had the mechanic look into poor performance. When pulling hard like when passing, 4th gear for now, my bike just didn’t seem to pull like I would have expected above 6K. Almost felt like it was t getting enough fuel. Mechanic found nothing wrong. I even asked about the possibility of that exhaust flapper not fully opening. Tested ok. I tested with stock slip back on. No difference.
So, I bit the bullet and scrapped BMWs stock exhaust manifold and went with Akras Titanium headers. Would not have thought this would be the answer but, PROBLEM SOLVED. Not sure if there was maybe a cat restriction or that flapper was not fully opening but the problem is no longer there. It now pulls like a horse as far past 6K as you want to go.


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Does the akrapovic header have a exhaust flapper? If not are there any fault codes triggered when the flapper is disconnected?

No flapper or cat in header. Disconnect cables from flapper motor and leave motor in place no faults.

Will be fitting NoCat headers to my 15RS soon. Do you have the Akra baffle in or removed from your slip on. I am expecting no cat and no baffle may be loud.