Add reliability and styling to your Focus RS/ST with the Mishimoto expansion tank.
This tank features baffles internal to prevent coolant starvation from overflow ports on the engine.
During high speed cornering, braking, and acceleration, the baffles internal reduce coolant sloshing.
A sight tube has been included by the engineers at Mishimoto for proper observation of hot and cold coolant levels, making maintenance of the engine much easier.
Eventually, the health of your plastic expansion tank will need consideration.
Prone to failure after years of constant temperature variations, the Mishimoto tank is constructed from durable, TIG-welded aluminum for optimal durability and longevity.
It reuses the stock expansion tank cap and includes an overflow nipple on the fill neck for adding an additional coolant tank so your Focus RS stays NHRA legal.
All areas of concern are covered with this upgrade.
Notably, the stock tank of the Focus is an engine bay eye sore, whereas the Mishimoto tank comes in three different variants to help with customization aesthetic: black, wrinkle red, or Wrinkle Nitrous Blue.
Each of these options works with both the 2013+ Focus ST and the new 2016+ Focus RS.
For convenience, your new coolant tank upgrade can be installed in under one hour as it was engineered with perfect fitment in mind.
Like all Focus RS parts, this expansion tank also includes the Mishimoto Lifetime Warranty.
