Cravenspeed 17% Reduction Pulley Kit - R52, R53 Mini Cooper S, JCW

New product

More boost in, equals more power out. The Cravenspeed 17% supercharger reduction pulley will create more boost by spinning the supercharger quicker and delivering more boost. Supplied with the kit are the correct cooler running spark plugs and shorter aux belt to suit the new pulley of your choice.  

More details

£ 165.00 tax incl.

More info

With a standard Mini Cooper S intercooler we recommend the 17% reduction pulley for normal road driving with the odd spirited drive. Should you plan to push your MCS harder than this, for example at track days or on closed roads we would recommend using a 15% reduction pulley.

Should you live in Northern Ireland or Republic of Ireland we offer a fitting service of the complete kit for an additional £120.00

All New parts will carry their manufacturer's standard warranty

Terms and Conditions


Shipping Information 

We offer FREE shipping on all items to UK and Ireland! 

Your item will be carefully packed and dispatched within 24 hours (Mon-Fri) of receiving payment (Except Holidays) 

Most items will be posted out the same day if payment is received before 11am. 

We use Royal Mail 1st Class Signed For delivery for small items, and Parcelforce 48 for larger items. This will mean a signature will be required on delivery of item(s).

Please ensure all good are checked thoroughly before signing for delivery. Refunds/Exchanges are not possible for goods that have been damaged in transit. The words unexamined or unchecked on the delivery note are not acceptable. We will not be held responsible for the refund of goods damaged in transit if they have been signed for as in good condition



All new parts will come with the standard manufacturer’s warranty they supply

Any new part custom ordered cannot be returned / refunded

All used parts (Excluding Performance Parts) will come with a 30-day warranty.

All parts listed will be for a RHD vehicle unless otherwise specified

Any engine purchased must be fitted with a new Timing Belt/Chain as per manufacturer’s recommendation. A new water pump is recommended and all engines must be filled with new oil upon installation. Failure to follow this procedure will invalidate guarantee/warranty

Warranty will be void if any part supplied is tampered with in any way i.e. seal broken, taken apart, misfitted, our markings removed etc.

Parts guarantee will cover parts cost only. It does not cover any labour charges from any fault arising from the fitting of the part. We will not cover any labour charges, so it is your responsibility to ensure the part supplied is correct prior to fitting.