Heating and Cooling Overflow Tanks and Catch Cans

Mishimoto

Mishimoto 08+ Subaru WRX/STI Black Aluminum Coolant Overflow Tank

$421.07

SKU: M00C MMRT-STI-08BK

In Stock
In Stock
Ships by Jun 16
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The Mishimoto Aluminum Coolant Overflow Tank is a direct-fit replacement designed for 2008-2021 Subaru WRX and STI models. This overflow tank offers enhanced durability over the stock plastic tank and provides a clean, professional look for your engine bay.

Constructed from fully TIG-welded aluminum, it features a CNC-machined dipstick for easy coolant level monitoring. Installation is straightforward and can be completed in under 30 minutes without requiring modifications. It is available in a black anodized finish and pairs well with stock or Mishimoto radiators.

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

BrandMishimoto
Part NumberM00C MMRT-STI-08BK

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.

View Full Return Policy