{"product_id":"mishimoto-aluminum-expansion-tank-for-2013-2018-ford-focus-rs-and-st-black","title":"Mishimoto Aluminum Expansion Tank for 2013-2018 Ford Focus RS and ST – Black","description":"Add some reliability and engine bay styling to your Focus RS\/ST with the Mishimoto RS\/ST expansion tank. This tank features internal baffles to prevent coolant starvation from overflow ports on the engine. Also, during high speed cornering, braking, and acceleration, the internal baffles reduce coolant sloshing. The engineers at Mishimoto have included a sight tube to allow for proper observation of hot and cold coolant levels, making engine maintenance much easier.----Eventually, you'll have to consider the health of your plastic expansion tank. Plastic is 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.----It's worth noting the Focus's stock tank is an engine bay eye sore, whereas the Mishimoto tank comes in three different variants to help with aesthetic customization: black, wrinkle red, or Wrinkle Nitrous Blue. Each of these options works with both the 2013-2018 Focus ST and the new 2016-2018 Focus RS. For convenience, you can install your new coolant tank upgrade in under one hour as it was engineered with perfect fitment in mind. Like all our Focus RS parts, this expansion tank also includes the Mishimoto Lifetime Warranty.\nEngine coolant reservoir designed to store and regulate excess coolant for proper system operation. Durable construction resists heat and pressure, helping prevent leaks and maintain optimal temperature.\n\u003cul\u003e\n  \u003cli\u003eInternal baffle keeps coolant near overflow port during aggressive driving, preventing air entry into coolant system\u003c\/li\u003e\n  \u003cli\u003eSight tube allows for proper hot and cold coolant levels\u003c\/li\u003e\n  \u003cli\u003eInstalls in under one hour\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eEnhance your Ford Focus RS or ST with the Mishimoto Aluminum Expansion Tank, designed for durability and optimal engine bay aesthetics. Constructed from TIG-welded aluminum, this expansion tank offers superior resilience against heat and pressure, reducing the risk of leaks and extending service life compared to traditional plastic tanks. Its sleek black finish adds a modern touch to your engine bay, replacing the stock plastic reservoir with a robust aluminum alternative that maintains a clean, professional appearance.\u003cbr\u003eFeaturing internal baffles, the Mishimoto tank prevents coolant starvation during aggressive driving maneuvers such as high-speed cornering, braking, and acceleration. These baffles also minimize coolant sloshing, ensuring consistent coolant flow and reducing air entrapment in the system. The included sight tube allows for easy monitoring of hot and cold coolant levels, simplifying maintenance and troubleshooting. The design incorporates a reusable stock cap and an overflow nipple on the fill neck, enabling the addition of an extra coolant tank to meet NHRA regulations, making this upgrade suitable for both street and track use.\u003cbr\u003eInstallation is straightforward, with a perfect fitment engineered for quick setup—typically under one hour. The Mishimoto expansion tank is compatible with both the 2013-2018 Ford Focus ST and the 2016-2018 Focus RS, offering an aesthetic upgrade that complements your vehicle's engine bay. Available in three colors—wrinkle red, wrinkle blue, or black—these tanks allow for customization to match your build. Backed by Mishimoto's lifetime warranty, this expansion tank provides a reliable, long-term solution for maintaining optimal coolant system performance and enhancing your vehicle’s appearance.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eDurable TIG-welded aluminum construction resists heat and pressure\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eInternal baffles prevent coolant starvation and reduce sloshing during aggressive driving\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eSight tube for easy monitoring of hot and cold coolant levels\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eIncludes overflow nipple for additional coolant tank installation\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eReuses stock cap for seamless installation\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eFits 2013-2018 Ford Focus ST and 2016-2018 Focus RS models\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eAvailable in black, wrinkle red, or wrinkle blue for customization\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eEngineered for quick installation, typically under one hour\u003c\/li\u003e\u003c\/ul\u003e\u003cul\u003e\u003cli\u003eBacked by Mishimoto’s lifetime warranty\u003c\/li\u003e\u003c\/ul\u003e\u003cbr\u003e\nFitment:\u003cbr\u003e\n2013 Ford Escape S\u003cbr\u003e\n2013 Ford Escape SE\u003cbr\u003e\n2013 Ford Escape SEL\u003cbr\u003e\n2013 Ford Escape Titanium\u003cbr\u003e\n2013 Ford Focus Electric\u003cbr\u003e\n2013 Ford Focus S\u003cbr\u003e\n2013 Ford Focus SE\u003cbr\u003e\n2013 Ford Focus ST\u003cbr\u003e\n2013 Ford Focus Titanium\u003cbr\u003e\n2014 Ford Escape S\u003cbr\u003e\n2014 Ford Escape SE\u003cbr\u003e\n2014 Ford Escape Titanium\u003cbr\u003e\n2014 Ford Focus Electric\u003cbr\u003e\n2014 Ford Focus S\u003cbr\u003e\n2014 Ford Focus SE\u003cbr\u003e\n2014 Ford Focus ST\u003cbr\u003e\n2014 Ford Focus Titanium\u003cbr\u003e\n2014 Ford Transit Connect Titanium\u003cbr\u003e\n2014 Ford Transit Connect XL\u003cbr\u003e\n2014 Ford Transit Connect XLT\u003cbr\u003e\n2015 Ford Escape S\u003cbr\u003e\n2015 Ford Escape SE\u003cbr\u003e\n2015 Ford Escape Titanium\u003cbr\u003e\n2015 Ford Focus Electric\u003cbr\u003e\n2015 Ford Focus S\u003cbr\u003e\n2015 Ford Focus SE\u003cbr\u003e\n2015 Ford Focus ST\u003cbr\u003e\n2015 Ford Focus Titanium\u003cbr\u003e\n2015 Ford Transit Connect Titanium\u003cbr\u003e\n2015 Ford Transit Connect XL\u003cbr\u003e\n2015 Ford Transit Connect XLT\u003cbr\u003e\n2016 Ford Escape S\u003cbr\u003e\n2016 Ford Escape SE\u003cbr\u003e\n2016 Ford Escape Titanium\u003cbr\u003e\n2016 Ford Focus Electric\u003cbr\u003e\n2016 Ford Focus RS\u003cbr\u003e\n2016 Ford Focus S\u003cbr\u003e\n2016 Ford Focus SE\u003cbr\u003e\n2016 Ford Focus ST\u003cbr\u003e\n2016 Ford Focus Titanium\u003cbr\u003e\n2016 Ford Transit Connect Titanium\u003cbr\u003e\n2016 Ford Transit Connect XL\u003cbr\u003e\n2016 Ford Transit Connect XLT\u003cbr\u003e\n2017 Ford Focus Electric\u003cbr\u003e\n2017 Ford Focus RS\u003cbr\u003e\n2017 Ford Focus S\u003cbr\u003e\n2017 Ford Focus SE\u003cbr\u003e\n2017 Ford Focus SEL\u003cbr\u003e\n2017 Ford Focus ST\u003cbr\u003e\n2017 Ford Focus Titanium\u003cbr\u003e\n2017 Ford Transit Connect Titanium\u003cbr\u003e\n2017 Ford Transit Connect XL\u003cbr\u003e\n2017 Ford Transit Connect XLT\u003cbr\u003e\n2018 Ford Focus Electric\u003cbr\u003e\n2018 Ford Focus RS\u003cbr\u003e\n2018 Ford Focus S\u003cbr\u003e\n2018 Ford Focus SE\u003cbr\u003e\n2018 Ford Focus SEL\u003cbr\u003e\n2018 Ford Focus ST\u003cbr\u003e\n2018 Ford Focus Titanium\u003cbr\u003e\n2018 Ford Transit Connect Titanium\u003cbr\u003e\n2018 Ford Transit Connect XL\u003cbr\u003e\n2018 Ford Transit Connect XLT\u003cbr\u003e\n2019 Ford Transit Connect Titanium\u003cbr\u003e\n2019 Ford Transit Connect XL\u003cbr\u003e\n2019 Ford Transit Connect XLT\u003cbr\u003e\n2020 Ford Transit Connect Titanium\u003cbr\u003e\n2020 Ford Transit Connect XL\u003cbr\u003e\n2020 Ford Transit Connect XLT\u003cbr\u003e\n2021 Ford Transit Connect Titanium\u003cbr\u003e\n2021 Ford Transit Connect XL\u003cbr\u003e\n2021 Ford Transit Connect XLT\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; 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