Polaris has unveiled the RZR Pro R Factory Boost, a desert and sand racing side-by-side producing 400 hp from a new turbocharged 2.0-litre four-cylinder called the ProStar Fury. It will make its competitive debut at the 2027 King of the Hammers, which runs from January 21 to February 6, 2027.
The new machine sits above the Pro R Boost that Polaris revealed a couple of months earlier, a 275 hp side-by-side using a turbocharged 2.0-litre inline-four. The Factory Boost's output exceeds the 394 hp of a US-spec Audi RS3, and its $200,000 starting price is almost three times that car's starting figure.
What the ProStar Fury engine and chassis bring
Polaris has not published a torque figure for the ProStar Fury engine. A full MoTeC package and ECU with different power distribution settings manage the engine's output.
The Factory Boost is built for speed across open terrain: lightweight carbon fibre bodywork, a design intended to cut through the air at more than 100 mph, and a wheelbase 6.5 inches longer than the standard car for stability and body control. It rides on BF Goodrich tyres, with custom three-inch internal bypass Dynamix DV Live Valve shocks and a Fox steering damper to handle bumps and larger impacts.
The racing hardware extends to a competition-ready cage and a cabin two inches wider than the consumer RZR Pro R. A 34-gallon fuel tank gives a driving range of more than 200 miles. Polaris has not stated which cycle that range figure is measured on.

Built by the factory race team, sold to anyone with the money
Each example will be built by the Polaris RZR Factory Racing team. Buyers do not need to run a racing team or be a competitive racer, but the outlay is steep: prices start at $200,000.
That price positions the Factory Boost as a specialist purchase rather than a mainstream RZR. It is not road legal, so the money buys a dedicated off-road competition machine rather than transport. For buyers already racing desert events, the factory-built preparation and the longer wheelbase address the two things that matter most in that discipline: stability at speed and the ability to absorb rough ground without losing control.
What is still unannounced
Polaris has not released torque output for the ProStar Fury, nor detailed the range test procedure behind the 200-mile-plus claim. Beyond the King of the Hammers debut window, no further competition plans have been announced.


