A ProStar engine is an off-road vehicle engine that has been designed, engineered, and manufactured from the ground-up by the experts at Polaris who share the same passion for off-roading as you do.   ProStar engines are purpose-built, tuned, and designed specifically for your vehicle and application. By leveraging cutting-edge technology from automotive influences, we have emerged as a trusted leader in off-road powertrain technology. With over one million engines produced we’ve created the perfect balance of engineered features to ensure you are getting the maximum performance in every vehicle.

  • Power Density - industry leading output by displacement

    Customized - tuned to perform with each vehicle application

    Light Weight - reduced engine weight to increase overall vehicle performance

  • Testing - extreme testing in the worlds harshest environments

    Riders First – core engineering teams dedicated to the riding experience with a passion for making the best possible engines and vehicles

    Engine Platforms - common core architectures within ProStar engine families

  • Design Simplicity - engines are designed to be easy to work on

    Designed with Vehicle - key access points planned with vehicle development

    Easy Maintenance - extended times between regular maintenance intervals and easy check points (Oil fill, drain, dipstick, coolant bleed etc…)

ProStar 32 ProStar 32
  • Powerful  single cylinder architecture with DOHC, 4 valves per cylinder, wet sump and light weight design specifically intended for Ranger usage

    Optimized for the Ranger ETX family

    Specifically tuned for easy starting and great power delivery  

ProStar 570 ProStar 570
  • Powerful  570cc single cylinder architecture with DOHC, 4 valves per cylinder, wet sump and  light weight design specifically intended for Ranger usage

    Optimized for the Ranger demands bringing the power of a twin cylinder but the efficiency of a single into the Ranger platform

    Specifically tuned to for maximum power and torque for both the Ranger full-size 570 and Ranger 570 applications

ProStar 900 ProStar 900
  • Powerful  875cc twin cylinder architecture with DOHC, 4 valves per cylinder, wet sump and light weight design specifically intended for Ranger usage

    Optimized for maximum torque, power and reliability

    Specifically tuned for smooth, quiet, industry leading performance and the hardest work

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