Subaru WRX/STI Coolant Reservoir Adapter - Koyo - 8mm - 2008-2015. Designed to connect the factory 8mm reservoir line to Koyo radiator part VH091662 for proper fit and function.

This purpose-built adapter provides the correct interface between your WRX/STI coolant reservoir return and the Koyo inlet, ensuring a secure hose connection and proper coolant return path. It’s a straightforward, model-focused solution that avoids improvised reducers and helps maintain consistent overflow function during spirited driving or daily use.

Features

• Direct fit for 2008-2015 Subaru WRX/STI using Koyo VH091662
• 8mm sizing matches OEM reservoir/overflow hose
• Solid, leak-resistant connection point
• Simple install with existing clamps and line routing

Have questions or need guidance on your setup? Call us at 512-982-9393 (TX) or 562-981-6800 (CA). We operate two locations in Austin, Texas and the Los Angeles, California area, where our team offers installation and customization services.

If you’re purchasing multiple items, contact us for potential shipping discounts. We install on premises at both locations.

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