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 our new accordion style boot made from high strength materials! Tests prove our Pro Series II axles to be 2 times stronger than the OEM shafts. Direct OEM fit replacement for 2014 and up Polaris XP 1000 models. 100% manufactured and assembled in the USA.