CravenSpeed 15% Supercharger Reduction Pulley Kit with Tool, Belt, and Brisk Racing Plugs View larger

CravenSpeed 15% Supercharger Reduction Pulley Kit with Tool, Belt, and Brisk Racing Plugs


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Simply the best reduction pulley you can buy for the first generation MINI Cooper S (R53), now with the tool you need to change it yourself, and Brisk Racing plugs!

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3 Items

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Instead of $257.81

$252.85 per 1

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Kit Includes:

  • CravenSpeed 15% Supercharger Reduction Pulley with hub adapter and four bolts
  • CravenSpeed Quick Puller pulley removal tool to remove your stock supercharger pulley
  • NGK Iridium IX Plugs, one-step colder (6988)
  • A Gates Micro-V Serpentine Belt sized for the 15% pulley (K060535)

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. 

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 kit 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% kit instead. If you plan to do wrenching on your own, make sure you have a puller designed to remove the MINI's press-fit OEM pulley.

Brisk Premium Plugs, One-Step Colder than Stock

BRISK Premium LGS spark plug utilizes a very unique, semi-surface discharge electrode design. With this this design, the spark plug is able to fire a much larger spark plug gap, because the spark glides along the surface of the insulator, requiring much less energy than firing a traditional style air gap. Longer spark discharge makes more contact with the A/F mixture, igniting more molecules in the A/F mixture over a larger area. Since the air fuel mixture inside of the combustion chamber is not homogenous (has different concentration at different places), it is beneficial that the spark discharge is not confined to only one set place (like with a conventional spark plug), instead, the spark discharge can occur anywhere in 360 degree perimeter of the BRISK LGS spark plug tip. Sold in sets of four. 

  • Due to the large parallel surfaces between the electrodes, BRISK LGS spark plug gap has higher capacitance than a fine point electrode spark plug. 
  • It is easier (takes less energy) for a spark to glide along the surface of the insulator than to break through the air gap. 
  • Silver is the best conductor of any metal! It conducts 560% more electricity & 481% more heat than Platinum, and 276% more electricity & 177% more heat than Iridium.
  • BRISK LGS spark plugs offer faster and better ignition of each ignition cycle, thus helping to improve fuel efficiency and fuel mileage.
  • Spark Plug Patented Firing Tip Design, No Indexing or Gapping Required

Gates Serpentine Belt for Reduction Pulley (K060535)

If you are adding a reduction pulley, you need a shorter belt. Length of this belt: 1379mm. Replace your belt when you upgrade your pulley on your 2002-2006 MINI Cooper S and every 25,000 miles thereafter. This kit ships with the K060535 belt.  If you would like a different belt, leave us a note when you check out. Belt options include:

  • K060539HD: Heavy Duty 1385 mm for 15% Reduction Pulley (or JCW), or for 17% Reduction Pulley with 2% Overdrive Crank Pulley
  • K060535: 1379 mm for 15 or 17% Reduction Pulley (the belt we normally ship in our kits.)

Quick Puller Tool

With this tool, you will be able to remove the stock press fit pulley safely, without removing the tensioner. Time is money and this puller will save you both. For use in removing stock supercharger pulley. The puller body is made of heat treated carbon steel and has a tooth profile to match the OEM pulley exactly. The center screw is grade 8 quality. Having a pulley party? Our puller will not bend during normal use, and will last for many pulls. (If you would like to remove a JCW pulley, we do offer a tool designed for it specifically.  Let us know at checkout and we can make the switch.)

Instructions: See the card included in the pulley box for a link to instructions on CravenSpeed's website.

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