Madness MINI Cooper S Supercharger Pulley

For a minimal amount of money, the MINI Cooper S Supercharger Pulley can make even the Monday commute seem like a run around Laguna Seca. The stock pulley is one of the first things BMW MINI Cooper S owners replace to increase the performance of their car. Changing to a 15% smaller supercharger pulley on an otherwise stock motor has been shown, through independent testing, to provide increases of 15-20 horsepower with similar increases in torque.

The smaller supercharger pulley causes the unit to spin faster and create more boost. More boost=bigger grin! Stock Mini Cooper S engines will see a 3-4 pound increase in boost. Add to that a modified intake or exhaust and your Mini Cooper S will have even bigger power gains. MINI Cooper S tuners, including the venerable John Cooper Works, have extensively tested the 15% reduction supercharger pulley and found it to be ideal for street and track use.

Included is an installation CD and tool that with a moderate amount of mechanical ability makes installing the supercharger pulley the ideal weekend project. We've been told that it makes a great gift for the Mini Cooper S Enthusiast too.

For the even more adventurous, changing to a 19% reduction pulley will have the boost kicking in 750rpm sooner than the 15% pulley.

The 19% Mini Cooper S Supercharger Pulley is ideal for street driving conditions ONLY! It is not recommended for the long high revving situations typically seen on the racetrack!  Sustained 6000-7600rpm generates more heat reducing the 19% pulley's effectiveness.

Stainless steel 15% pulley = 16.0oz/501g
Stainless steel 19% pulley = 13.2oz/374g

Madness lightweight 15% pulley =   5.5oz/155g
Madness lightweight 19% pulley =   5.0oz/125g

REMOVAL TOOL
Using our simple pulley removal tool allows you to remove the stock pulley with ease. Most removals take just 5-10 minutes. Our removal tool also does not destroy the stock pulley allowing you to reinstall it if necessary.
 
ALIGNMENT
Our self alignment pulley ensures 100% accuracy during pulley installation ensuring no thrown belts from improper installation.
 
INSTALLATION INSTRUCTIONS
Included with every kit is a CD containing installation instructions with lots of pictures to assist you or whoever you might have doing the work.

Also recommended are a set of cooler running spark plugs.  This simple upgrade gains you 1-3hp and more importantly helps prevent and pre-detonation that might occur from higher boost temperatures.  Cooler running plugs help transfer the added heat into the cylinder head helping to reduce in cylinder temperatures by a few degrees. This helps prevent and pre-detonation from occurring. Inexpensive insurance is the way we look at it.