Catalytic Converter for Subaru Legacy (2005-2009) 2.5L

Direct-Fit Replacement Catalytic Converter for 2005-2009 Subaru Legacy

Restores proper exhaust flow and emissions compliance: Direct-fit rear catalytic converter assembly engineered specifically for 2005-2009 Subaru Legacy 2.5L models eliminating P0420 catalyst efficiency DTCs.

The Stock Legacy Substrate Deterioration and Exhaust Restriction

Aging factory catalytic converters on fourth-generation Legacy models frequently suffer from internal ceramic washcoat degradation, sintering, and oil-ash contamination typical of high-mileage EJ-series boxer engines. Over prolonged thermal cycling, degraded substrate material creates elevated backpressure, strangling exhaust gas scavenging, degrading fuel economy, and triggering recurring check engine lights.

The Engineering Solution

This replacement converter utilizes a durable ceramic honeycomb substrate formulated with high noble-metal washcoat loading for reliable chemical reduction and clean exhaust output. Encased in heavy-gauge, corrosion-resistant stainless steel, it matches original equipment dimensions for an exact drop-in rear fitment without cutting, bending, or welding. Supplied with pre-packaged mounting hardware, clamps, and precision gaskets, it ensures an airtight seal capable of withstanding the heat and pulse dynamics of the flat-four layout.

Technical Specifications

Compatibility

• Subaru Legacy 2005-2009 2.5L (Rear Placement)

The Subaru Boxer Caliber

Engineered to handle the unique pulse dynamics of Subaru boxer engines, this unit maintains correct exhaust velocity while keeping emissions systems fully operational and trouble-free.