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Mishimoto Engine Coolant Reservoir MMRT-STI-08 product image 1
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Mishimoto

Mishimoto MMRT-STI-08 Aluminum Coolant Overflow Tank, Polished

SKU: MMRT-STI-08
Barcode: 748354025712

$233.95

Mishimoto MMRT-STI-08 Aluminum Coolant Overflow Tank, Polished

Aluminum construction handles repeated cooling-system heat cycles
Mishimoto MMRT-STI-08 Aluminum Coolant Overflow Tank, Polished

Dipstick allows easier cold coolant level checks
Mishimoto MMRT-STI-08 Aluminum Coolant Overflow Tank, Polished

Installs quickly compared with major cooling upgrades
Mishimoto MMRT-STI-08 Aluminum Coolant Overflow Tank, Polished

Polished finish gives the engine bay a cleaner look

Verified U.S. Supplier

Fitment Data Included

30-Day Returns
In stock

Warranty

Products sold by Modridge may be covered by the original manufacturer’s warranty, when applicable. Warranty terms, coverage, exclusions, and claim requirements vary by brand and product line.

If you believe your item has a manufacturer defect, contact us with your order number, product photos, and a description of the issue. We’ll help review the case and guide you through the next steps based on the manufacturer’s policy.

This warranty does not cover normal wear, improper installation, misuse, modification, racing damage, accident damage, or installation-related issues unless the manufacturer’s policy states otherwise.

Shipping & Returns

Shipping

This item ships from an authorized U.S. distributor. Processing and transit times may vary depending on stock availability and destination. Most orders ship within 1–3 business days.

Returns

Returns are accepted within 30 days of delivery. Items must be uninstalled, unused, and in original packaging. Programmers and calibration devices that have been paired to a vehicle are not eligible for return. See our Returns & Refunds page for full details.

California Proposition 65 Warning

WARNING: Cancer and Reproductive Harm - www.p65warnings.ca.gov

Emissions & Compliance

Emissions Compliance Exempt
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Mishimoto MMRT-STI-08 Aluminum Coolant Overflow Tank, Polished

$233.95

$233.95

Aluminum

Material

Under 30 Min

Install

Polished

Finish

Product Description

Mishimoto MMRT-STI-08 is an aluminum coolant overflow tank upgrade for supported 2008-2021 Subaru WRX/STI applications. It replaces a plastic-style overflow tank with a more durable aluminum part for enthusiast Subaru builds that see repeated heat cycling.

All-aluminum fully welded construction, installation in under 30 minutes, and a dipstick that allows proper cold coolant level checks. Those details make the tank useful for owners who want a cleaner, stronger cooling-system component without turning the job into a major engine-bay project. The polished finish also improves the look of a visible engine-bay cooling component. It also keeps level checks more straightforward.

This coolant overflow tank is vehicle-specific for supported Subaru WRX/STI fitment, so it should be selected by application.

Specifications

Brand
Mishimoto
Part Number
MMRT-STI-08
Product Type
Engine Coolant Reservoir
Warranty
Lifetime Warranty
Option
Polished
Install Difficulty
1
Quantity per Application
Normal Quantity Used in a Vehicle
GTIN
748354025712
Country of Origin
CN
Package Length (in)
10.2
Package Width (in)
6.5
Package Height (in)
10
Package Weight (lbs)
3.5

Fitment / Application

2013 | Subaru | WRX | Base
2013 | Subaru | WRX | Limited
2014 | Subaru | Impreza | WRX
2014 | Subaru | Impreza | WRX Limited
2014 | Subaru | Impreza | WRX Premium
2014 | Subaru | Impreza | WRX STI
2014 | Subaru | Impreza | WRX STI Limited
2014 | Subaru | WRX | Base
2014 | Subaru | WRX | Limited
2015 | Subaru | WRX | Base
2015 | Subaru | WRX | Limited
2015 | Subaru | WRX | Premium
2015 | Subaru | WRX STI | Base
2015 | Subaru | WRX STI | Launch Edition
2015 | Subaru | WRX STI | Limited
2016 | Subaru | WRX | Base
2016 | Subaru | WRX | Limited
2016 | Subaru | WRX | Premium
2008 | Subaru | Impreza | WRX
2008 | Subaru | Impreza | WRX STI
2009 | Subaru | Impreza | WRX
2009 | Subaru | Impreza | WRX Premium
2009 | Subaru | Impreza | WRX STI
2010 | Subaru | Impreza | WRX
2010 | Subaru | Impreza | WRX Limited
2010 | Subaru | Impreza | WRX Premium
2010 | Subaru | Impreza | WRX STI
2010 | Subaru | Impreza | WRX STI Special Edition
2011 | Subaru | Impreza | WRX
2011 | Subaru | Impreza | WRX Limited
2011 | Subaru | Impreza | WRX Premium
2011 | Subaru | Impreza | WRX STI
2011 | Subaru | Impreza | WRX STI Limited
2012 | Subaru | Impreza | WRX
2012 | Subaru | Impreza | WRX Limited
2012 | Subaru | Impreza | WRX Premium
2012 | Subaru | Impreza | WRX STI
2012 | Subaru | Impreza | WRX STI Limited
2013 | Subaru | Impreza | WRX
2013 | Subaru | Impreza | WRX Limited
2013 | Subaru | Impreza | WRX Premium
2013 | Subaru | Impreza | WRX STI
2013 | Subaru | Impreza | WRX STI Limited

What's in the Box

• Coolant overflow tank × 1

Installation & Documents

Allow the cooling system to cool completely before installation. Refill and bleed the cooling system as required, then check all fittings for leaks after heat cycling.