Fits Audi A6 Quattro 16-18, A7 Quattro 16-18, A8 Quattro 15-18, Q7 17-19;Full dual pulley kit; Bolt on 57.75mm supercharger drive pulley; Bolt on 187mm crank pulley; Spins the charger 26.4% faster for massive torque and HP gains with tuning; Anodized and E-coated factory black; Appropriate belt included; Retains factory harmonic balancer;