Subaru STI Coolant Overflow Tank - Perrin Performance - Red - `04-`21. The precision-crafted, CNC-machined Perrin coolant overflow tank replaces the factory plastic reservoir with a durable red aluminum unit engineered for 2004–2021 Subaru STI models.

This replacement tank cleans up the engine bay while offering a long-lasting alternative to brittle plastic. Machined from solid aluminum and finished in a bright red anodize, the Perrin tank is made to withstand the under-hood environment better than the stock plastic part. It is intended for enthusiasts who want a durable, visually distinct component that maintains the OEM function of storing excess coolant and allowing you to monitor levels easily.

Features

• CNC-machined aluminum construction for improved durability
• Red anodized finish for corrosion resistance and consistent color
• Designed as a replacement for the OEM plastic overflow tank on 2004–2021 STI models
• Cleaner, more durable alternative to the stock reservoir for engine-bay customization

If you have questions or want help confirming fitment, call us directly — we’re happy to advise: 512-982-9393 (TX) or 562-981-6800 (CA). We have two locations in Austin, Texas and the Los Angeles, California area where we offer installation and customization services. If you are considering purchasing multiple items, contact us for potential shipping discounts. We install on premises at both locations.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov