Intercooler for Subaru Legacy (2008-2009) 2.5L

High-Efficiency Bar-and-Plate Top-Mount Intercooler for 2008-2009 Subaru Legacy (BL/BP)

What it Does: The Upgraded Top-Mount Intercooler replaces the restrictive factory charge air cooler on the 2008-2009 Legacy GT to lower intake air temperatures and maintain stable manifold boost pressure.

The Stock Subaru Legacy Heat Soak and End-Tank Failure

The OEM intercooler on the BL/BP chassis utilizes a lightweight tube-and-fin core mated to crimped plastic end tanks. Under increased boost or aggressive driving, these crimped seams frequently separate, leading to boost leaks and erratic AFR readings. Additionally, the thin core lacks adequate thermal mass, resulting in rapid heat soak from the EJ255 turbocharger and engine block, which spikes charge air temperatures and causes the ECU to pull ignition timing.

The Engineering Solution

This upgraded unit features a dense, high-flow bar-and-plate all-aluminum core engineered to withstand up to 430 horsepower without structural degradation. TIG-welded cast aluminum end tanks eliminate OEM crimp failures entirely while optimizing airflow across the core face. The increased core thickness dramatically improves thermal dissipation and reduces pressure drop, while the heat-dispersing black finish facilitates radiant cooling. It features an integrated blow-off valve flange designed to accept the factory bypass valve or aftermarket OE-pattern valves without modification.

What's Included

• 1 x Black Bar-and-Plate Top-Mount Intercooler

Technical Specifications

Compatibility

• 2008-2009 Subaru Legacy GT 2.5L EJ25 Turbo

Frequently Asked Questions & Fitment Warnings

Does this fit the BL/BP Legacy?

Yes, this is a direct fit for the 2008-2009 Subaru Legacy equipped with the EJ255 turbo engine. This part does not fit naturally aspirated 2.5i 4-cylinder models or 3.0R 6-cylinder variants.

Can I reuse the factory blow-off valve with this intercooler?

Yes, this intercooler features a pre-machined flange that accepts the factory bypass valve or any aftermarket unit utilizing the stock two-bolt pattern.

The Subaru Performance Caliber

Tailored specifically for high-output boxer applications, this intercooler delivers the knock suppression, charge density, and durable boost containment required to extract reliable power from your turbocharged Subaru powertrain.