APR Supercharger Pulley

APR Supercharger Pulley Upgrades for Audi & Volkswagen

APR (Audi Performance & Racing) has been the go-to name in Volkswagen Group performance since 1997, and their supercharger pulley lineup is one of the most thoroughly engineered solutions available for owners of 3.0 TFSI-powered Audis and Volkswagens. Rather than offering a one-size-fits-all approach, APR has developed a modular, stage-based pulley system that lets enthusiasts dial in exactly the level of performance they want.

How APR Supercharger Pulleys Work

The core principle behind APR's pulley upgrades is simple but highly effective: spin the factory supercharger faster to generate more airflow, boost pressure, and ultimately more power. APR's Supercharger Drive and Crank Pulley Upgrades dramatically increase horsepower and torque by increasing the rotational speed of the factory supercharger. Owners can choose to upgrade one or both pulleys, with each step building meaningfully on the last.

• Supercharger Drive Pulley: APR's Drive Pulley decreases the diameter of the factory pulley from ~63.25mm to 57.75mm, which in turn spins the supercharger ~9.5% faster. The pulley is CNC machined from billet stainless steel, e-coated black for an OEM appearance, and is press-fitted to the factory supercharger unit.
• Supercharger Crank Pulley: The Crank Pulley Upgrade increases the diameter of the factory pulley from ~162mm to ~187mm, spinning the supercharger ~15.4% faster. It is CNC machined from lightweight billet aluminum with weight-saving pockets throughout, features an anodized black finish, and includes new crank pulley bolts. Critically, it retains the factory harmonically balanced crank pulley and bolts on top of the existing unit.
• Dual Pulley Setup: Upgrading both the supercharger drive and crank pulleys results in the factory supercharger spinning ~26.4% faster than stock — a figure arrived at after extensive engine and chassis dyno testing with various pulley sizes and supercharger speeds.

The APR ECU Integration Advantage

What truly separates APR from generic pulley suppliers is their software expertise. APR's Stage 2 Pulley ECU Upgrade makes the necessary engine management adjustments to handle the increased supercharger speeds, ensuring the added airflow is properly exploited rather than wasted. This hardware-plus-software philosophy means every APR pulley upgrade is calibrated as a complete system, not just a bolt-on part.

For those pursuing maximum output, 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 even higher levels of performance.

Fitment Coverage

APR's supercharger pulley lineup covers a wide range of popular 3.0 TFSI applications, including the Audi S4, S5, SQ5, A6 Quattro, A7 Quattro, A8 Quattro, Q5, Q7, and the Volkswagen Touareg. Both "press-on" and "bolt-on" variants are available to suit earlier and later generation platforms. Pulleys are available individually or as complete drive-and-crank kits with the appropriate supercharger belt included.

Browse the full selection of APR Supercharger Pulleys to find the right upgrade for your Audi or VW, or explore the complete APR product lineup for additional engine hardware, ECU software, and performance accessories.