They may give you a little more lift out of that style of "coil spacer" (wedge type)...... but will also decrease the springs ability to compress = less suspention travel and poorer ride comfort. I wouldn't recommend it!
If you went with a coil spacer that spaced the spring from the end, that would be better...... but I'd take a close and careful look at current CV angles. The steeper you go the hard it is on them and the faster they wear/break.
More lift will increase your axle angles so make sure they can take it before you add more lift.
Is your catvos lift all in the a-arms or does it have brackets too?
You could add a bracket lift or make your own to move the upper shock mounts down an inch or 2.
I am thinking about stacking this one on top of my 5in. 2009 2014 Polaris Sportsman 550 850 XP Xtreme 2" Lift Kit | eBay
If you have deep pockets a portal lift is always an option too.
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