Front axle;300M axle shaft;CVs feature 4340 chromoly body & 300M internals - Inner CV plunges 2.25;33 spline; 300M center bar with plunging inboard CV eliminates halfshaft pull-out;Designed for extreme racing conditions;Sold Individually;California Residents: WARNING The Pro Series II is designed to suit the needs of different applications and conditions from trail riding to desert racing. The Pro Series II features a sealed outboard CV with the new accordion style boot made from high strength materials! Tests prove the Pro Series II axles to be 2 times stronger than the OEM shafts. Direct OEM fit replacement for 2016 and up Polaris XP Turbo models. 100% manufactured and assembled in the USA.