Aluminum Coolant Expansion Tank for Subaru WRX (2008-2014) GR Hatchback / GV Sedan

Upgrade your turbocharged WRX with an aluminum coolant overflow reservoir that holds 25% more capacity, fits perfectly with FMIC setups, and handles the heat of hard driving.

Better Cooling for Your Boosted WRX

The 2008-2014 WRX (GR hatchback and GV sedan) represents one of Subaru's most popular turbocharged platforms. Whether you're running your EJ255 stock or building boost, these engines generate serious heat—especially when modified or driven hard. The factory plastic coolant reservoir does its job on a stock car, but it's bulky, prone to cracking under heat cycles, and downright obstructive when you're running a front-mount intercooler.

This aluminum expansion overflow reservoir solves all three problems. Precision-engineered to fit the WRX platform, it relocates the reservoir for perfect clearance with FMIC piping while increasing capacity by 25% over the OEM part. The welded aluminum construction handles extreme temperature swings without cracking, and the included 1.3 bar pressure cap maintains proper system pressure for consistent cooling performance—whether you're at the track, attacking backroads, or dealing with stop-and-go traffic.

Key Features at a Glance

• Direct Bolt-On Fitment: Engineered specifically for 2008-2014 WRX—no modifications required
• 25% Increased Capacity: Holds more coolant than the factory reservoir for better heat management during hard driving
• FMIC-Friendly Design: Relocated mounting position clears front-mount intercooler piping without interference
• Welded Aluminum Construction: Handles extreme heat cycles and underhood temperatures without cracking like plastic
• 1.3 Bar Pressure Cap Included: Maintains optimal cooling system pressure; also accepts OEM cap if preferred
• Clean Engine Bay Look: Sleek aluminum finish adds a performance aesthetic under the hood

Installation & Compatibility

Installation is straightforward with basic hand tools. The reservoir mounts in a relocated position that works perfectly on stock cars while providing critical clearance for aftermarket front-mount intercooler setups. This is an essential upgrade when installing a FMIC kit, but it's also a smart preventative upgrade for any WRX owner looking to improve cooling capacity and eliminate the risk of cracking factory plastic.

Built for Boost and Heat

Welded aluminum construction ensures this reservoir can handle the thermal stress of turbocharged engines running high boost, track days, or spirited driving. Unlike the brittle factory plastic that becomes fragile over time, this aluminum tank maintains its integrity through countless heat cycles. The increased capacity means your cooling system has more reserve when temperatures climb—giving you peace of mind during aggressive driving.

What's Included

• Aluminum coolant overflow reservoir
• 1.3 bar high-pressure radiator cap
• All necessary mounting hardware
• Installation instructions

Fitment: 2008-2014 Subaru WRX/Impreza WRX (does not fit STI)