APR 3.0T Supercharger Dual Pulley and Belt Kit - Press on
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 press fitted to the factory supercharger unit.
APR's Supercharger Crank Pulley Upgrade increases the diameter of the factory pulley from ~162mm to ~187mm, which in turn spins the supercharger ~15.4% faster. This results in a larger bump in horsepower and torque across the entire RPM range, as the supercharger is spinning at an even higher rate of speed. The pulley retains the factory harmonically balanced crank pulley and bolts on top of the existing unit. It is CNC machined from light weight billet aluminum with weight saving pockets throughout. It has an anodized black finish and includes new crank pulley bolts.
Upgrading both the supercharger drive and crank pulleys results in the factory supercharger spinning ~26.4% faster than stock. This speed was chosen after extensive engine and chassis dyno testing with various pulley sizes and supercharger speeds. The result is an even higher horsepower and torque gain across the entire RPM range. However, at the airflow levels achieved with a dual pulley setup, maximum power is severely restricted by the factory throttle body unit. The APR Ultracharger Throttle Body Upgrade is necessary to take full advantage of the dual pulley configuration, and is available in platform specific variations for the B8/B8.5 A4/A4/S4/S5, Q5/SQ5 and C7 A6/A7.
Software sold separately
- APR 3.0T press-on supercharger pulley
- APR 3.0T bolt-on crank pulley
- Matching belt
- Crank pulley hardware
APR Stage 2 Calibration Results:
Audi S4 / S5 (B8) Stage Fuel Grade Power Torque Gain Over Stock Stage 2 Dual Pulley 91 AKI / 95 RON 445 HP 412 FTLBS +100 HP +80 FTLBS Stage 2 Dual Pulley 93 AKI / 98 RON 465 HP 428 FTLBS +120 HP +97 FTLBS Stage 2 Dual Pulley 100 AKI / 104 RON 513 HP 459 FTLBS +168 HP +126 FTLBS Stage 2 Dual Pulley 104 AKI / 108 RON 527 HP 469 FTLBS +182 HP +136 FTLBS Audi S4 / S5 (B8.5) Stage Fuel Grade Power Torque Gain Over Stock Stage 2 Dual Pulley 91 AKI / 95 RON 445 HP 415 FTLBS +134 HP +98 FTLBS Stage 2 Dual Pulley 93 AKI / 98 RON 468 HP 432 FTLBS +157 HP +115 FTLBS Stage 2 Dual Pulley 100 AKI / 104 RON 513 HP 461 FTLBS +202 HP +147 FTLBS Stage 2 Dual Pulley 104 AKI / 108 RON 527 HP 471 FTLBS +215 HP +157 FTLBS
Please note that stage 2 software is required for use with this kit.