Aluminum Coolant Expansion Tank for Subaru Legacy GT (2005-2009) 2.5L Turbo Engine

Ditch the yellowing, brittle plastic ticking time bomb under your hood and bulletproof your EJ255's cooling loop.

Performance Aluminum Coolant Expansion Tank for Subaru Legacy GT (BL/BP Chassis)

The 4th Gen Legacy GT is arguably the best sleeper Subaru ever built, but it has a weakness. The factory plastic coolant reservoir sits dangerously close to the turbocharger's heat. Over heat cycles, that OEM plastic turns brittle, discolors, and eventually cracks at the seams. This aluminum tank eliminates that failure point entirely for your 2005-2009 LGT.

Whether you are running a stock Top Mount Intercooler (TMIC) or a large Front Mount (FMIC) setup, this fits. The geometry is designed to clear aftermarket piping that usually fights with the bulky OEM plastic tank. It solves the fitment headache while cleaning up the engine bay aesthetics.

Why You Need This Upgrade

• Delete the Plastic Risk: Replaces the prone-to-fail bonded plastic seams with durable, TIG-welded high-grade aluminum construction.
• Increased Thermal Capacity: Holds 25% more coolant than stock, giving your cooling system more volume to absorb heat spikes.
• FMIC Friendly: Specifically profiled to provide clearance for intercooler piping, making this essential for "Stage 2+" builds.
• Higher Pressure Threshold: Includes a 1.3 Bar radiator cap to raise the coolant boiling point during spirited driving.

Technical Specifications

Installation & Fitment Notes

This unit drops directly onto the factory mounting points on the intake manifold. Installation takes less than 30 minutes with basic hand tools. While a high-pressure 1.3 Bar cap is included, the neck is machined to accept the OEM Subaru cap if you prefer factory pressure specs.

Protect your head gaskets and clean up your engine bay with a tank that handles the heat.