CravenSpeed 15% Supercharger Reduction Pulley for 2002 - 2006 MINI Cooper S R53

Description

Simply the best reduction pulley you can buy for the first generation MINI Cooper S (R53). Add 20 hp to your MINI.
Smaller Pulley = More Go:
Smaller SC pulley spins faster
Faster spin increases boost
More Boost increases acceleration
Easy Installation
Safe for Extended Use
CravenSpeed's supercharger pulleys are machined to a specific reduction of the original equipment on your MINI's supercharger. It is widely accepted that these sizes are safe amount of reduction on this particular supercharger. Smooth, form fitting teeth on your pulley take longer to machine but are worth the extra time. CravenSpeed pulleys will neither eat nor throw your belt. You can be confident your belt will last long, and run quietly. We do recommend using a slightly smaller belt with these reduction pulleys (Gates K060535, not included).
15% or 17%?
If both sizes are safe for the supercharger which one should you choose? The supercharger is only creating boost under acceleration, on a normal or even a spirited drive this is only occasional. However, at the track or an autocross event acceleration is sustained and frequent. If you use your MINI for these types of events, it is better to use the 15% reduction pulley. This is because the 17% pulley causes the supercharger to heat more rapidly and the warm air begins to negate the positive effects of the extra PSI earlier in the band.
Will it work on my car?
This pulley will work on all supercharged MINI models except the JCW which already has a similarly reduced size (12%) pulley on the supercharger.  If you would like to upgrade a JCW MINI, consider a 17% pulley instead. If you plan on wrenching on your own, make sure you have a puller designed to remove the MINI's press-fit OEM pulley.
Replace your belt when you upgrade your pulley and every 25,000 miles thereafter. The Gates K060535 belt is shorter than the stock belt and is recommended for both 15% or 17% reduction pulleys (not included). If you have a 2% overdrive crank pulley that you want to use with this supercharger pulley, then use Gates belt K060539 instead.
Instructions:
See CravenSpeed's website for instructions.
California residents – for off-road use only.  Check your local legal requirements if in a CARB compliant state.
See our other listings for more CravenSpeed and Alta Performance products, including pulley puller tools, belts and colder spark plugs.
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