The CravenSpeed stock size pulleys are stock diameter (OEM sized) crank pulleys, utilizing the original belt layout. Since the crank pulley diameter is unchanged, they maintain alternator output at exactly stock output levels so you need not worry about flat batteries or weak charging capabilities. Through extensive weight savings afforded by 6061 aircraft aluminum construction, power gains of up to 10% are available depending on how your MINI is set up. CravenSpeed crank pulleys come perfectly balanced, and feature anodizing for superb wear resistance & strength.
CravenSpeed Lightweight Crank Pulley
$139.00
The rule of thumb is that each pound of weight taken off the engine’s rotating assembly is worth approximately 2.7HP. The concept is that the crank is a parasite; it does not put power to the drivetrain but still requires the energy produced by the engine to rotate. When you reduce this parasitic weight, you release power that was previously used only for spinning the supercharger and alternator. This Cooper S lightweight crank pulley weighs 1.09 lbs compared to the 2.35 lb stock MINI crank pulley (Net savings 1.26 lbs).
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| Make | Model | Year |
|---|---|---|
| MINI | COOPER JCW | 2007 - 2013 |
| MINI | COOPER S | 2007 - 2013 |
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