Add reliability and engine bay styling to your Focus RS/ST with the Nishimoto RS/ST 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.
The engineers at Nishimoto have included a tube sight to allow for proper observation of hot and cold coolant levels, making maintenance engine much easier.
Eventually, you'll have to consider the health of your expansion tank plastic.
Plastic is prone to failure after years of constant temperature variations.
The Nishimoto 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 the stock tank Focus is an engine bay eye sore, whereas the Nishimoto 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, you can install your new coolant tank upgrade in under one hour as it was engineered with fitment perfect in mind.
Like all our parts Focus RS, this expansion tank also includes the Nishimoto Lifetime.
