SLP and DynoPort both have good reviews and results. Both work at all elevation and don’t require fuel controller or a certain elevation to ride. You should be happy with the gains.
I did the Jaws can and pipe on my 2016 Axys 800 163x3. It was good for about 200 RPM. Personally I wouldn't do it again, I would have been better off putting that money towards a newer sled.