Audi S4 Dual Pulley Kit - APR - Press On - Black - 10-17. This matched drive and crank pulley set increases supercharger speed for stronger performance on your 3.0 TFSI S4.

APR’s press-on 57.75 mm stainless drive pulley replaces the ~63.25 mm stock unit for about 9.5% more blower speed. The anodized 187 mm billet crank overdrive bolts to the factory harmonic balancer for another ~15.4%. Together the supercharger spins ~26.4% faster. The drive pulley is CNC machined and e‑coated black; the lightweight crank features weight-saving pockets. An appropriate belt and new crank bolts are included. Specific ECU software is required to maximize output (sold separately). For best results with dual pulleys, APR’s Ultracharger throttle body is recommended.

Features

• 57.75 mm press-on SC pulley + 187 mm bolt-on crank pulley
• CNC machined: stainless drive; billet aluminum crank
• Retains factory harmonic balancer
• Black e-coat/anodized finish
• Belt and new crank bolts included
• Tool MS100025 required to remove factory drive pulley
• Fits 2010–2017 Audi S4 3.0 TFSI (B8/B8.5)

Questions or planning an install? Call us in Austin, Texas or the Los Angeles, California area. We offer professional installation and customization services. 512-982-9393 (TX), 562-981-6800 (CA).

Buying multiple items? Contact us for potential shipping discounts. We install on premises at both locations.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov