Subaru STI Coolant Overflow Tank - Perrin Performance - Neon Yellow - `04-`21. A precision CNC-machined replacement for the factory plastic overflow tank, this Perrin unit brightens the engine bay while providing a durable, long-lasting reservoir for coolant overflow.

Made to suit 2004–2021 Subaru STI models, the Perrin coolant overflow tank replaces the OEM plastic piece with a machined aluminum unit finished in high-visibility neon yellow. The anodized surface resists corrosion and makes fluid level checks easier at a glance. Its compact, engineered shape keeps the tank tidy in the engine bay and provides a refined, purpose-built alternative to the original unit without unnecessary claims about performance changes.

Features

• CNC-machined aluminum construction for consistent fit and finish
• Neon yellow anodized finish for corrosion resistance and easy fluid visibility
• Designed for 2004–2021 Subaru STI fitment as a replacement for the OEM overflow tank
• Precision machining to align with factory mounting locations

This Perrin overflow tank is a straightforward upgrade for enthusiasts looking to replace worn or unattractive plastic tanks with a durable, visually distinct option. If you have questions or want help confirming fitment, call us directly — we’re happy to assist. We have two locations that offer installation and customization services: Austin, Texas and the Los Angeles, California area. 512-982-9393 (TX) | 562-981-6800 (CA)

Please contact us if you’re purchasing multiple items — shipping discounts may be available. We install on premises at both locations.

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