FULL FITMENT: 2017-2020 X3/MAX 2016-2020 HD8, HD10 2018?C2020 Sport/Trail 1000s,900s,800s All ModelsReplaces the following OEM part number: 417300391,422280652,422280651,417300383Manufacturing, quality control certifications ?? ISO-14001, ISO-9001, and IATF-16949. 3rd Generation heavy-duty, high-twist Aramid Fiber cord for HIGH HORSEPOWER TENSILE LOAD requirements. Making it the strongest belt on the market, surpassing even our EX and Sand Storm lines. Highest shock load rating to date being able to withstand the power of the 400hp machines. Increased top cog pressure load design that increases sidewall rigidity, prevents top cog bowing, but still allows for increased rotational flexibility. Bottom cog uses HIGH MODULOUS RUBBER COMPOUND (BZX1) for better heat resistance and heat disation. Bottom cog is impregnated with short Aramid Fibers for better belt-to-sheave adhesion and reduced overall belt temperature. Latest bottom cog design for greater rotational efficiency at full shift. P