Highest shock load rating to date being able to withstand the power of the 400hp machines. Bottom cog uses HIGH MODULOUS RUBBER COMPOUND (BZX 1) for better heat resistance and heat dissipation. Bottom cog is impregnated with short Aramid Fibers for better belt-to-sheave adhesion and reduced overall belt temperature.Fitment:2020 RZR Pro XP2017-2020 RZR XP TurboXP-4 Turbo Including S models