APR's Supercharger Drive and Crank Pulley Upgrades dramatically increase horsepower and torque by increasing the rotational speed of the factory supercharger. APR's Stage II Pulley ECU Upgrade makes the necessary engine management adjustments to handle the increased supercharger speeds, and in turn allows the engine to create more power. The pulleys are sold separately, allowing for multiple levels of performance, each of which builds upon the other. Finally, when combined with APR's Ultracharger Throttle Body Upgrade in a dual pulley setup, the system is alleviated of power robbing inlet restrictions, allowing the engine to achieve exciting new levels of performance!. 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 operating at a higher rate of speed. The pulley is CNC machined from billet stainless steel, e-coated black for an OEM appearance and is bolted on with new OEM bolts.. Please note, specific software is required to maximize output with this product. This system is only for use with bolted on pulleys. For pressed on pulleys, use part number MS100135. A new belt is required. Use part number RS100001 with a factory crank pulley and part number RS100002 with an APR crank pulley.. Spins the charger 9.5% faster for massive torque and HP gains with tuning. APR 16-18 Audi A7 Quattro 3.0 TFSI (Gen 2) Supercharger Pulley - Bolt On. Fits Audi A6 Quattro 16-18, A7 Quattro 16-18, A8 Quattro 15-18, Q7 17-19. APR Supercharger Drive Pulley - 3.0 TFSI (Gen 2 bolt on). Bolt on 57.75mm supercharger drive pulley. Use APR pulley software for more gains. SUPERCHARGER PULLEY KIT 30TFSI 2 BO. Anodized and E-coated factory black. Pulley

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