SKU: 13703256825

Aluminium Expansion Tank Ford Focus ST 12+/RS 16+ - Black

Sale price$196.65 Regular price$218.50
Save 10%

Pay in installments of $54.62 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Sep 16 - Sep 21

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

Aluminium Expansion Tank Ford Focus ST 12+/RS 16+ - BlackAdd 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

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 aluminium 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 2012+ Focus ST and the new 2015+ 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.

  • Direct fit for the 2016+ Ford Focus RS / 2013+ Ford Focus ST
  • Sight tube allows for proper hot and cold coolant levels
  • Internal baffle keeps coolant near overflow port during aggressive driving, preventing air entry into coolant system
  • 100% aluminium, fully-welded construction for maximum durability during repeated temperature transitions
  • Overflow nipple on fill neck allows for installation of additional NHRA-mandated overflow reservoir
  • Fits with stock overflow tank cap
  • Available in Wrinkle Nitrous Blue, wrinkle red, or black powder-coated finish
  • Mishimoto Lifetime Warranty
  • Material: 6061 Aluminium
  • Baffled: True
  • Engine Codes: 2.0L EcoBoost / 2.3L EcoBoost​
  • Note: After a few hot and cold cycles, Mishimoto recommends checking the sight tube on the side of the expansion tank to confirm proper coolant level.
  • (1) Aluminium Expansion Tank w/ Sight Tube
  • (1) Overflow Hose
  • (2) Rubber Sleeves
  • Mishimoto Lifetime Warranty
  • 2012+ Ford Focus ST
  • 2016+ Ford Focus RS
        Shipping Notes
        • Free Standard Shipping on $100+ Orders to the USA.
        • Except Preorder products are shipped in 48 hours.
        • Delivery to the USA:
        1. Standard Shipping : 3-10 business days
        • If time is of the essence, please consider selecting expedited delivery for faster service.
        Exchange/Return Notes
        • We offer a 30-day return/exchange service after receiving.
        • Final sale items are not eligible for returns or exchanges.
        • To process your return/exchange, please contact us at [email protected]
        • Please click here for more details>>> Return & Exchange Policy
        SKU: 13703256825

        Discover Niche Categories That Outsell

        Top-Converting Item to Boost Your Average Order

        4.1 ★★★★★
        Based on 17 reviews
        Sort
        Highest Rating
        Newest First
        Oldest First
        Product Reviews
        A
        Verified Purchase
        Aristo
        Carnegie, US
        ★★★★★ 4
        Seems alright
        Size: CRV (2023-2025) 2.0L Hybrid, Size: CRV (2023-2025) 2.0L Hybrid
        The engine air filter seems alright while cabin air filter a bit flimsy as there is no support on two of the sides. I included photos comparison to original for those who are interested, all original are on the left side, and they are used so a bit dirty.
        WAS THIS REVIEW HELPFUL?YesReportShare
        Reviewed in the United States on July 27, 2025
        L
        Verified Purchase
        Louis
        Pawtucket, US
        ★★★★★ 5
        Perfect fit 2025 CRV hybrid!
        Size: CRV (2023-2025) 2.0L Hybrid
        Perfect fit for both air filters, engine and cabin on 2025 CRV hybrid!
        WAS THIS REVIEW HELPFUL?YesReportShare
        Reviewed in the United States on April 20, 2026
        Y
        Verified Purchase
        Ydel
        Lowell, US
        ★★★★★ 5
        Affordable Air Filter
        Style: CF285
        Good air filter, affordable and is doing its job. Easy to install too! It fit my 2014 Toyota Camry.
        WAS THIS REVIEW HELPFUL?YesReportShare
        Reviewed in the United States on May 31, 2026
        J
        Verified Purchase
        José D.
        New York, US
        ★★★★★ 5
        Good
        Style: CF285
        Perfect fit for my car 👍 The cabin air filter was easy to install and immediately improved the air quality inside. Good quality and great value for the price.
        WAS THIS REVIEW HELPFUL?YesReportShare
        Reviewed in the United States on May 29, 2026
        R
        Verified Purchase
        Robert Milkovitz jr
        Chelsea, US
        ★★★★★ 5
        Perfect fit, and it works
        Style: CF211
        This was a great price and a very good filter so far perfect fit easy to put in
        WAS THIS REVIEW HELPFUL?YesReportShare
        Reviewed in the United States on May 30, 2026

        recommand products