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Fulfillment From Multiple U.S. Warehouses
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Authorized Brand Dealer
Fulfillment From Multiple U.S. Warehouses
Enthusiast Owned & Supported
Easy Financing Available!
Authorized Brand Dealer
Fulfillment From Multiple U.S. Warehouses
Enthusiast Owned & Supported
Easy Financing Available!
Authorized Brand Dealer
Fulfillment From Multiple U.S. Warehouses
Enthusiast Owned & Supported
Easy Financing Available!
Authorized Brand Dealer
Fulfillment From Multiple U.S. Warehouses
Enthusiast Owned & Supported
Easy Financing Available!
Authorized Brand Dealer
Fulfillment From Multiple U.S. Warehouses
Enthusiast Owned & Supported
Easy Financing Available!
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1340 Cobb Dr, Unit 1, Eustis, FL 32736
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Mon – Fri: 8:30 am – 4:30 pm
Sat: 9:00 am – 2:00 pm
Sun: Closed
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Coolant Reservoirs
A reliable cooling system starts with a properly sealed expansion tank. The coolant reservoir—also called an overflow tank or surge tank—absorbs the natural expansion and contraction of your engine's coolant, maintaining proper system pressure and preventing air pockets that lead to hot spots and overheating. Whether your original plastic tank has finally cracked at the seam or you're upgrading to a more durable aluminum unit, this collection offers the replacement you need.
What to look for when choosing:
- Material: OEM-style tanks are typically molded from heat-resistant plastic, while upgraded options use TIG-welded aluminum for added strength and a clean engine bay aesthetic.
- Capacity: Volume is tuned to your vehicle's cooling system—using an undersized tank can cause fluid loss, while oversized may not allow full pressure relief.
- Cap & connections: Pay attention to the pressure rating of the cap and the number/size of hose fittings. Some tanks include an integrated level sensor or sight glass.
- Mounting: Most tanks reuse the factory bracket and bolts, but custom applications may require additional hardware—check the product's included parts list.
Browse by vehicle fitment to find a direct-fit coolant reservoir that matches your make and model. If you're chasing a track-ready cooling system or simply replacing a brittle original part with a quality aftermarket piece, a properly selected tank will keep coolant where it belongs.
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92 products
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$290.00
Fits 2008-2014 Subaru WRX and STI models.
The Cobb Coolant Overflow Tank (800655) is a direct-fit replacement for the factory plastic reservoir, providing a significant upgrade in both durability and engine bay aesthetics. Over time, original equipment (OE) plastic bottles can become brittle and crack due to constant heat cycles; this unit offers a robust solution designed to handle the rigors of performance driving while maintaining the correct expansion volume for your cooling system.
- Direct bolt-on installation to factory mounting points
- Replaces the prone-to-failure OE plastic overflow bottle
- Designed specifically for the 2008-2014 Subaru WRX and STI chassis
- Maintains factory cooling system pressure and expansion characteristics
- Manufacturer Part Number: 800655
$260.00
Fits 2004-2007 Subaru WRX and STI models.
The Cobb Coolant Overflow Tank and Washer Fluid Relocation Kit (MPN: 800630) is a precision-engineered solution for enthusiasts looking to optimize engine bay space and aesthetics. This kit replaces the bulky, failure-prone factory plastic tanks with a more compact and durable configuration, making it an essential upgrade for vehicles equipped with larger aftermarket intakes or front-mount intercooler (FMIC) piping that requires additional clearance.
- Streamlines the engine bay by consolidating the coolant overflow and relocating the washer fluid reservoir.
- Replaces factory plastic components that often crack or yellow over time with heat cycles.
- Provides necessary clearance for performance induction and cooling upgrades.
- Maintains full OE functionality for both the cooling system and windshield washer sprayer.
- Designed for a direct-fit installation on 04-07 GD-chassis Subaru WRX and STI models.
- Manufacturer Part Number: 800630
Can’t Find the Part You Need?
Our catalog represents only a portion of the automotive products available through our supplier network. If you cannot find a specific part, brand, or application on our website, submit a request below, and our team will help source it for you.
Please include as much information as possible, such as your vehicle's year, make, model, trim, engine, desired brand, or part number, to help us quickly identify the correct product.
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