Alta Performance Supercharger Pulley 17% AMP-ENG-205V2

The quickest and easiest way to add 20+ Wheel HP to your MINI Cooper S!

Body Design

• Constructed of lightweight 6061T6 aluminum to reduce rotational inertia and improve engine response
• Cross-drilled holes increase belt grip and reduce slippage as the belt stretches
• Oversized belt retainers help prevent the belt from jumping off

Shaft Coupler Design

• Features a stainless steel clamp-on coupler for a secure grip on the supercharger shaft
• Proven to work even on worn shafts (up to .020" wear)
• Includes installation aperture to visibly verify proper collar seating

Balanced

• Outer pulley is machined from solid billet aluminum for natural balance
• Non-symmetrical hub adaptor is precision balanced to offset bolt and slit weight
• Prototype balanced to within 0.1 gram at 16,000 RPM, exceeding OEM standards
• Production models incorporate balancing data from prototype

Pulley Size

ALTA Supercharger Pulleys are offered in two sizes: 15% and 17% reductions.

15% Reduction

• Industry standard size
• Produces smooth and safe power gains
• Increases output by approximately 20 WHP

17% Reduction

• Ideal for drivers seeking additional power
• Builds boost earlier in the RPM range
• Adds approximately 1.5 psi of boost at redline
• Delivers more low-end torque and extra top-end horsepower

Belt Fitment

Here you'll find the correct belt required for your particular supercharger pulley setup.

* Note: +5% Supercharger Pulley for Turbo kit uses #060547

Installation Tools

The ALTA Pulley Removal Tool is the perfect tool to reliably remove the factory supercharger pulley from your MINI Cooper S (tool does not work on JCW or GP pulleys).

You can purchase your own tool — perfect for club events or group installations.