Aluminum Radiator for Subaru Outback Legacy (2005-2009) 3.0L

High-Efficiency Aluminum Radiator for 2005-2009 Subaru Outback, Legacy

What it Does: The Aluminum Radiator replaces the leak-prone factory plastic-tank unit on the 2005-2009 Subaru Outback and Legacy 3.0L to dramatically increase thermal efficiency and prevent catastrophic engine overheating.

The Stock Subaru Outback, Legacy Cooling System Weakness

Factory radiators on the BL/BP chassis rely on composite plastic end tanks crimped to an aluminum core with elastomeric seals. Under prolonged thermal cycling and system pressure, the high-density heat output of the EZ30 3.0L flat-six embrittles the plastic, commonly resulting in split tank seams and hairline cracks at the upper hose neck. A sudden loss of coolant pressure on a boxer platform exposes the cylinder heads to immediate heat soak, risking head gasket failure and deck warping.

The Engineering Solution

Engineered as a rugged mechanical upgrade, this direct-replacement cooling assembly utilizes an all-aluminum construction featuring 100% TIG-welded end tanks and a furnace-brazed 2-row tube-and-fin core. Eliminating the vulnerable crimped plastic tanks removes factory blow-out points completely. The expanded dual-row core increases fluid capacity and air-to-coolant surface area, accelerating thermal dissipation under sustained loads, mountain ascents, or stop-and-go commuting without requiring modifications to the engine bay.

Technical Specifications

Compatibility

• 2005-2009 Subaru Outback 3.0L H6
• 2008-2009 Subaru Legacy 3.0L H6

Frequently Asked Questions

Does this fit the BL/BP Outback, Legacy?
Yes, this is a direct fit for the 2005-2009 Subaru Outback and Legacy equipped with the EZ30 3.0L H6 engine.

Can I reuse my factory cooling fan shroud and hoses with this unit?
Yes, the radiator features factory-spec mounting brackets and hose barb dimensions to retain your stock cooling fan assembly and coolant lines.

The Subaru Boxer Standard

Subaru's naturally aspirated EZ30 flat-six engines demand rigorous thermal stability to maintain optimal power delivery and block integrity; this heavy-duty aluminum radiator delivers the sustained heat rejection required to preserve your powertrain over high-mileage duty cycles.