Upgrade your engine bay with this high-quality aluminium coolant expansion tank, designed specifically for Subarus. Manufactured from durable aluminium, this tank is a direct replacement for the factory plastic unit, which is known to degrade, crack, or discolour over time due to heat and age.

Built to handle higher temperatures and pressures, this expansion tank is ideal for both daily-driven vehicles and performance builds. The aluminium construction improves reliability while also giving the engine bay a clean, motorsport-inspired appearance.

Features:

CNC-fabricated aluminium construction

Improved heat and pressure resistance over OEM plastic tanks

Direct bolt-on replacement for factory expansion tank

Corrosion-resistant finish

Designed to suit Subaru WRX cooling systems

Ideal for street, track, and high-performance applications

Supplied with titanium mounting bolts to replace the old steel ones.

Fits:

WRX 2002-2007

STI 2004-2016

(Is not compatible with the Spec C intake manifold)

All our stock is kept locally here in Australia for fast dispatch and reliable delivery. We’re a 100% Australian owned and operated company, dedicated to providing high-quality performance parts and exceptional customer service. Shop with confidence knowing your order is shipped from within Australia and backed by local support. For bulk orders or wholesale discount please email sales@jmccustommotorsport.com.au