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The stock water pump pulley is made from sheet metal. This Cooper S pulley is an oversized casting designed for total reliability and the larger diameter will slow down the water pump at higher RPM. This saves horsepower and can improve cooling at higher RPM.
4.57" diameter
Large Pulley Cast Steel Mini Cooper S Water Pump

Large Pulley Cast Steel Mini Cooper S Water Pump

Large Pulley Cast Steel Mini Cooper S Water Pump
Alternate Products
Classic Austin Mini water pump pulley large 1985 and later oversize
$108.95 Classic Austin Mini water pump pulley large 1985 and later oversize
The stock water pump pulley is made from sheet metal. This Cooper S pulley is an oversized casting designed for total reliability and the larger diameter will slow down the water pump at higher RPM. This saves horsepower and can improve cooling at higher RPM.
4.57" diameter
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