I'm sure one of the radiators is for cooling the air before it gets to the turbo.
That would be an intercooler not a radiator.
The RZR has a oretty unique cooling system (actually it has 2 cooling systems), it has a radiator that cools coolant that gets pumped via an electric pump through the Liquid charge air cooler for the Boosted intake air.
THe radiator that cools the engine itself is completely separate
This explains it well ---> https://www.youtube.com/embed/Yi2ni9uy6Ro?autoplay=1&enablejsapi=1&wmode=transparent
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