Primary Belt Pulley Nut: Upgraded material to titanium higher strength more corrosion rust resistant and lightweight. Processed by bluing for enhanced aesthetics.Make your ride stand out from the crowd. Primary Pulley: Upgraded to 45# steel with a blackened treatment and -temperature quenching making it more wear-resistant corrosion-resistant and stronger than the. 24 Teeth The number of teeth on the pulley has been increased from the 23 teeth to 24 teeth providing faster speed and allowing for higher speed under the stock powertrain. Item Specifications: Condition: Brand Processing: CNC Machined Color: Black Blue Package Included: 1 Primary Pulley 1 Primary Belt Pulley Nut 1 Gasket Fitment: For light X For light S For X160 For X260 Compatibility Disclaimer: This is an aftermarket replacement part.Any brand names or model designations mentioned are used solely for the purpose of demonstrating compatibility.