New R55-R61 Metal Expansion Tank

Our Heavy Duty Aluminum Coolant Expansion Tank directly addresses every structural flaw of the factory unit (17137823626) by replacing molded plastic composition with a fully TIG-welded 5052 aluminum construction. Aluminum eliminates the risk of seam separation, cracking, or heat deformation, providing a permanent solution that handles pressure and heat without expanding or fatiguing. To ensure exact fitment, the tank was designed using 3D CAD modeling, allowing for plug-and-play installation in the factory location. Unlike many aftermarket alternatives, no cutting, drilling, or custom brackets are required for installing the ECS Heavy Duty Aluminum Expansion Tank!

All hose barbs, bleed screws, and sensor ports are CNC-machined to precise tolerances, guaranteeing a leak-free seal with factory quick-disconnect hoses. A precision-designed threaded cap fitting ensures buttery smooth integration of the factory cap, as well as a precision seal with internal cap O-rings. To aid in serviceability, an integrated internal fill-level sightglass eliminates guesswork, allowing you to easily view your coolant level at a glance. The heavy-duty wrinkle black powder coat isn't just for aesthetics�it protects the exterior of the tank from corrosion and engine bay heat, maintaining a clean, OEM+ look for years to come.