alternator pulley

Mini Cooper S alternator pulley The KAVS Motorsport +5% Alternator Pulley is designed to reduce the speed of the alternator when other engine modifications mean it would be spinning faster.

Much like it is a good idea to fit a KAVS Motorsport Enlarged Crank Pulley to your engine when you install a smaller supercharger pulley (available from KAVS Motorsport in various sizes), fitting our enlarged Alternator Pulley will mean that the alternator will not have to work as hard when Enlarged Crank Pulleys and smaller supercharger pulleys are installed.

The benefits include:

  • Increased life of your alternator
  • More BHP; because the design of the pulley allows the belt to work more efficiently with reduced stress
  • Allows you to run a higher rev limit for more performance


The KAVS Motorsport +5% Alternator Pulley is made from steel and finished with a galvanic coat.

The product is also useful for owners who want to use their standard OEM belt with our smaller supercharger pulleys around the 11% up to 15% sizes.
We here at KAVS Motorsport recommend the +5% Alternator Pulley as a good all-round size, however if you decide you would like a specific size then our in-house design team would be happy to make you a custom KAVS Motorsport Alternator Pulley to your own specifications; whether you need a bigger or smaller pulley.

Our custom sized Alternator Pulleys can be useful if you:

  • Run an extremely small supercharger pulley and would like to slow the alternator down even more
  • Have a lot of electronic/In Car Entertainment (I.C.E) accessories in your car, and would like to boost the electricity to ensure your accessories run smoothly

The KAVS Motorsport Alternator Pulley has the same lifetime warranty that our supercharger pulley does, and still meets all the required standards (ISO 9001:2008 and ISO 14001:2004).

Ordering: info@kavsmotorsport.com

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