What is the Polaris RZR Pro R 4? We're thinking Polaris started making this machine with a hefty dose of badass, gave it a bunch of steroids, and then invited your whole family to hop in. With a 2-liter engine, industry leading power, and a whole host of beefy upgrades, how can we improve it? That's easy. Check out our windshields, lift kits, portals, and more for the the Polaris RZR Pro R 4. Just because it's already awesome doesn't mean we can't make it awesomer.