I’ve got the Akra and it only made a slight difference in tone. I just added the cat delete from comp werkes and it made a big difference. Weight savings, sound improvement and without any proof of it- I feel that there is more power as well. My Husky dealer said it probably wouldn’t really impact the engine but I couldn’t get updates unless i re-install the cat if I bring it in (I’m ok with that as it takes about 45 minutes to do). I swung by the KTM dealer and he said very low risk of it damaging anything if any at all. Both advised letting the bike idle for 15 minutes after installing and then to turn of the bike with no revving. I’ve had no issues, no errors on dash, it does have a bit more of a smell coming out at stops and when idling but nothing that really bothered me. I wish I would have done it earlier.