Supercharger Drive and Crank Pulley with Belt Press on 3.0 TFSI Fits 2009-2018 Audi A6/A7/A8 Quattro 2013-2017 Audi Q5 2011-2015 Audi Q7 2010-2017 Audi S4/S5 2014-2017 Audi SQ5 APR

This full dual pulley kit includes a press-on 57.75mm supercharger drive pulley and a bolt-on 187mm crank pulley. The smaller supercharger drive pulley (reduced from ~63.25mm to 57.75mm) increases supercharger speed by approximately 9.5%. The larger crank pulley (increased from ~162mm to ~187mm) increases supercharger speed by approximately 15.4%. When combined, these pulleys spin the supercharger approximately 26.4% faster than stock. This leads to substantial gains in horsepower and torque across the entire RPM range. The supercharger drive pulley is CNC machined from billet stainless steel and features an e-coated black finish for an OEM appearance. It is press-fitted to the factory supercharger. The crank pulley is CNC machined from lightweight billet aluminum with weight-saving pockets, an anodized black finish, and retains the factory harmonically balanced crank pulley by bolting on top of the existing unit. New crank pulley bolts are included. For optimal performance with the dual pulley setup, the APR Ultracharger Throttle Body Upgrade is necessary as the factory throttle body can restrict maximum power at the higher airflow levels achieved. This upgrade is available in platform-specific variations for the B8/B8.5 A4/A4/S4/S5, Q5/SQ5, and C7 A6/A7 platforms.