Polaris RZR 900 Specs and Review Side-By-Side (SxS) The Polaris RZR 900 is a sport-utility vehicle unveiled to the public in 2015. Featuring a twin-cylinder ProStar® engine, tilt steering, selectable driveline modes, and a lineage traced back to the Ranger, this 4×4 wowed the off-roading community and took work-sport hybrids to a whole new level. this was the aim of Polaris when it Gilomen Innovations Powersports Tuning and Repair Experts Polaris ECU / Clutch tuning, Powersports repair shop, Marine / Boat repair shop, Snowmobile repair shop, Engine rebuilding, welding, machine shop. Ranger 1000, Ranger