Add reliability and engine bay styling to your Focus RS/ST with the Mishimoto expansion tank RS/ST.
This tank features baffles internal to prevent coolant starvation from overflow ports on the engine.
During high speed cornering, braking, and acceleration, the internal baffles also reduce coolant sloshing.
A sight tube has been included by the engineers at Mishimoto to allow 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.
After years of constant temperature variations, plastic is prone to failure.
The Mishimoto tank is constructed from durable aluminum, TIG-welded 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.
It's worth noting that the stock tank of the Focus is an eye sore in the engine bay, 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 Focus ST 2013+ and the new Focus RS 2016+.
For convenience, your new coolant tank upgrade can be installed in under one hour as it was engineered with fitment perfect in mind.
Like all Focus RS parts, this expansion tank also includes the Mishimoto Lifetime Warranty.
