I have a 2017 Tuono and I bought a AR shorty exhaust. Just after it's first service and a couple of days before the TT I threw it on without the DB killer unmapped and within a few mins of riding the yellow engine management light popped onto the screen. Rather than run a new engine super lean and with a warning light on it at the TT I decided to put the standard can back on. Since then I did about 3, 000k and yesterday put the shorty on with the db killer in it.

The interesting thing is there is now no engine management light on, granted its running lean and i belive needs mapping to get the most out of it but it gives me a slight sense of relief that the engine isn't saying there is a major issue.

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