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Heating and Cooling› Overflow Tanks and Catch Cans

Mountune

Billet Aluminum Coolant Expansion Tank Kit

$379.90 $375.00 Save $4.90

SKU: 20-0318-KIT

In Stock
In Stock
Ships by Jul 30
Free Shipping
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Description

The Mountune coolant tank kit is a billet aluminum replacement for the original plastic coolant expansion tank found in the Focus ST and RS. It maintains the same functionality as the factory unit while providing an additional 160ml of fluid volume to the cooling system.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandMountune
Part Number20-0318-KIT
CategoryHeating and Cooling

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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