The most common failure point of any MINI cooling system has long been the OE plastic expansion/coolant tank. The OE plastic tank is prone to cracking, breaking, and in extreme cases, exploding, due to the plastic becoming brittle from constant heat cycling.
PROMINI has designed and manufactured a permanent solution, ensuring that this issue will soon be a thing of the past; the PROMINI Aluminum Coolant Tank.
Originally designed with racing applications in mind, the PROMINI Aluminum Coolant Tank has become a must-do replacement upgrade for everything from daily driven MINIs to dedicated track MINIs.
Designed to mount in the factory location and use the factory cap without any modifications for fitment, the PROMINI Aluminum Coolant Tank is available in Polished Silver or in  
Black Anodized Finish.
OEM Coolant Cap Sold Separately -->
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Black Anodized Version Available -->
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