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APR MS100185 - Supercharger Drive Pulley Kit margin_15 All-Kevlar stranded inner core andAPR MS100185 Supercharger Drive Pulley Kit APR Supercharger Drive and Crank Pulley with Belt Bolt on 3. 0 TFSI Supercharger Drive Pulley Kit; w Belt; Bolt On 187 mm. Crank Pulley; APR's Supercharger Drive Pulley Upgrade decreases the diameter of the factory pulley from ~63. 25mm to 57. 75mm, which in turn spins the supercharger ~9. 5% faster. This results in a healthy bump in horsepower and torque across the entire RPM range with the supercharger