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The Mishimoto aluminum expansion tank for 2013–2018 Ford Focus ST and 2016–2018 Focus RS (Wrinkle Red) replaces the OEM plastic reservoir with TIG‑welded aluminum for improved longevity and styling. Internal baffles reduce coolant slosh under aggressive driving and a sight tube allows quick level checks. The tank reuses the stock cap, includes an overflow nipple for an auxiliary reservoir, installs in under an hour, and carries a Mishimoto Lifetime Warranty.
Mishimoto 2013+ Ford Focus ST/2016+ Focus RS Aluminum Expansion Tank - Wrinkle Red
