SKU: B800655 | UPC: 700424681709
Cobb 08-14 Subaru WRX/STI Coolant Overflow Tank
The COBB Coolant Overflow Tank is a direct-fit replacement for the factory plastic reservoir on 2008-2014 Subaru WRX and STI models. Constructed from durable 6061-T6 billet aluminum, it resists cracking from repeated heat cycles common in performance driving. With 50% greater capacity than stock, it handles coolant expansion during track sessions or hard launches without spilling.
Key Features
- Billet Aluminum Build: 6061-T6 material withstands high temperatures and pressure, outlasting plastic OEM tanks prone to failure.
- Expanded Capacity: 50% larger volume captures excess coolant reliably, maintaining system integrity under boost.
- Direct Bolt-On Design: Mounts in factory location using stock brackets, no cutting or fabrication needed.
- Black Anodized Finish: Corrosion-resistant coating protects against engine bay elements for long-term durability.
- Complete Kit: Includes laser-etched aluminum cap, AN fittings, and mounting hardware for straightforward install.
Product Notes
- MPN 800655; replaces vulnerable OEM plastic tank on EJ-series engines.
- Monitor coolant levels regularly during initial use after installation.
- Packaged securely; shipping weight 1.9 lbs, box dimensions 10″ x 8″ x 4″.
Installation Notes
- Professional installation recommended.
- Drain coolant system before removal; reuse OEM hoses if undamaged.
- Secures to factory mounts with provided stainless steel hardware.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2008-2014 | Subaru | Impreza | WRX |
| 2008-2014 | Subaru | Impreza WRX | STI |
Why Choose COBB?
- Decades of Subaru-specific engineering experience from grassroots racing origins.
- Components tested on dynos and tracks for real-world reliability.
- Made in USA with precision CNC machining for exact tolerances.
Frequently Asked Questions
- Q: Will this fit 2015+ STI models?
A: No, designed specifically for 2008-2014 WRX/STI with EJ25 engines; later models use different mounting. - Q: What material and finish are used?
A: 6061-T6 billet aluminum with black anodized coating for heat resistance and engine bay protection. - Q: What is the warranty coverage?
A: Backed by COBB’s limited lifetime warranty against manufacturing defects when installed properly.
Shipping & Handling
- Method: UPS Ground
- Availability: In stock – ships same or next business day
- Packaging: Protective cardboard box, 10″ x 8″ x 4″ dimensions
- Weight: 1.9 lbs
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