Catalytic Converter for Mitsubishi Galant (2004-2012) 2.4L Rear

Direct-Fit Rear Catalytic Converter for 2004-2012 Mitsubishi Galant

What it Does: The direct-fit rear catalytic converter restores factory exhaust scavenging and federal emissions compliance on the 2004-2012 Mitsubishi Galant 2.4L to eliminate P0420 diagnostic codes and reduce backpressure.

The Stock Mitsubishi Galant Exhaust Restriction & Degradation

Over extended operating cycles, the factory underfloor catalytic converter on the ninth-generation DJ1A chassis suffers from severe thermal fatigue, carbon contamination, and internal washcoat sintering. The original ceramic substrate is vulnerable to mechanical fracture and thermal shock, causing the internal honeycomb to crumble or melt. This degradation chokes exhaust gas velocity, increases parasitic exhaust backpressure on the exhaust stroke, elevates cylinder head temperatures, and triggers recurring catalytic inefficiency check engine lights.

The Engineering Solution

Manufactured to restore precise exhaust dynamics, this rear catalytic converter assembly features a heavy-gauge stainless steel outer casing designed to withstand road salt, moisture, and high thermal loads. Inside, a high-flow ceramic substrate is washcoated with precious metals to ensure rapid light-off and optimal catalytic conversion of hydrocarbons, carbon monoxide, and oxides of nitrogen. Mandrel-formed collector sections maintain constant pipe diameter for uniform exhaust pulses, while thick, OE-spec laser-cut flanges match factory downstream mounting points. The included hardware and crush seals ensure a leak-free seal without custom cutting or welding.

Technical Specifications

Compatibility

• 2004-2012 Mitsubishi Galant DE 2.4L L4 (4G69)
• 2004-2012 Mitsubishi Galant ES 2.4L L4 (4G69)
• 2005-2007 Mitsubishi Galant SE 2.4L L4 (4G69)
• 2009 Mitsubishi Galant Sport Edition 2.4L L4 (4G69)
• 2010-2012 Mitsubishi Galant SE 2.4L L4 (4G69)

Frequently Asked Questions

Does this fit the DJ1A Galant?
Yes, this is a direct fit for the 2004-2012 Mitsubishi Galant equipped with the 4G69 engine.

Will this direct-fit unit clear an active P0420 diagnostic trouble code?
Yes, replacing a degraded factory substrate with this EPA-compliant converter restores catalytic threshold efficiency and clears catalyst-efficiency trouble codes once upstream mechanical issues are resolved.

The Mitsubishi Reliability Standard

Engineered to withstand the demanding exhaust temperatures generated by the MIVEC-equipped 4G69 powertrain, this replacement converter delivers OE-grade acoustic dampening, reliable exhaust flow velocity, and enduring federal emissions compliance.