15% Reduction Supercharger Pulley

The CravenSpeed Supercharger Pulley is an aluminum component engineered to enhance the performance of your MINI Cooper R53 (2001-2006). This pulley provides a 15% reduction in rotational speed, causing the supercharger to spin faster. This increased supercharger speed translates directly into more boost, which in turn results in quicker acceleration and improved throttle response. Crafted from durable aluminum, this pulley is designed with smooth, form-fitting teeth to prevent belt wear and maintain quiet operation. Unlike some imitations, CravenSpeed's original design, championed since 2005, ensures your belt will last longer and run without noise. When choosing between a 15% or 17% reduction pulley, the 15% option is recommended for sustained acceleration events like track days or autocross. This is because the 17% pulley can cause the supercharger to heat up more rapidly, potentially negating the benefits of increased PSI earlier in the acceleration band. For daily driving, the difference is often negligible. This pulley is compatible with all supercharged MINI models, including JCW variants, as it is slightly smaller than even the stock JCW pulley. CravenSpeed recommends using a slightly smaller Gates FleetRunner belt with these reduction pulleys; a guide is available to help you select the correct belt size.