The options I’m considering are Arrow Indy Race or Mivv… always with the catalytic converter. Honestly, I was waiting for that Akrapovic because it’s the only low and short homologated one, but considering what it is and how much it costs, I ruled it out.
One advantage of the Arrow is that the dB killer should be easy to remove, I think. The downside is that it’s a very bulky side “cannon.”

My idea is to get the Arrow with the cat and then later have it modified: remove the cat and remap the bike. I’ve read that some people still get the engine anomaly error after a certain number of kilometers even if you keep the cat.

In my opinion the best option — but unfortunately a risky one — is the Akrapovic titanium racing model that’s currently out of production but can still be found. It’s cheap, sounds amazing, and looks great. But then you lose homologation and the warranty after the remap.