There’s a new top dog, too, as Polaris tossed a turbo on the RZR Pro R‘s 2.0-liter four-cylinder to achieve a walloping 275 hp. The new king-of-the-hill is called the RZR Pro R Boost, and it makes 50 hp more than the naturally aspirated variant. Further downstream of the turbo 2.0-liter, the RZR Pro R Boost touts tougher, reinforced driveline components—think half shafts, which love to snap at the worst times. That last bit is great news for folks who’ve had related problems with the “regular” RZR Pro R’s front diff in the past. The RZR Pro R Boost starts at $49,999 and $53,999 for the two- and four-door Ultimate models, respectively, while the Ultra trim costs $52,999 and $56,999.