I'd invest in a set of these from Holz (minimum)
ATV || Holz Racing Products as some of the other manufacturers have let us down in their earlier promise of strengthening products for this relatively weak frame and some of these components attached to it.
I hope that I can even 'say' such a thing here on the rzrforum...as I was quickly kicked off of a major forum for daring to suggest such a thing to some very rabid Polaris bobbleheads .

(btw, I've had a Rhino since day one and now own 2 Polaris'; incl. the Rzr).