This kit includes all you need to upgrade and outfit your vehicle with one of our Taper Bore Pulleys. The RPM of the supercharger is what determines the boost created in the MINI Cooper S. Reducing the size of the supercharger pulley, increases the blower RPM which increases the boost.
AVAILABLE SIZES
| Size | Horsepower | Torque |
|---|
| 15% | + 12 hp | 14 ft lbs |
| 17% | + 15 hp | 18 ft lbs |
| 19% | + 20 hp | 22 ft lbs |
This increases boost from the factory 10.5 PSI to 16.0 PSI with the 19% reduction pulley. We have experienced up to 20 HP increases, with torque improvement by as much as 22ft. lb. The impressive torque increase is what translates into some incredible acceleration. To keep this power increase stable and linear across the power band this kit includes a cooler temperature spark plug that is used to regulate fuel burn at higher boost. Also included is a properly sized bett for the reduced size of pulley.
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