Catalytic Converter for Kia Optima (2007-2008) 2.4L Rear

Direct-Fit Rear Catalytic Converter for 2007-2008 Kia Optima

What it Does: The direct-fit rear catalytic converter replaces the aged emissions unit on the 2007-2008 Kia Optima 2.4L to restore optimal exhaust gas scavenging, clear P0420 diagnostic trouble codes, and ensure complete emissions compliance.

The Stock Kia Optima Catalyst Washcoat Degradation

Aging catalytic units on high-mileage MG chassis vehicles routinely suffer from thermal fatigue, washcoat depletion, and internal carbon fouling. Over hundreds of heat cycles, excessive blow-by and unburnt hydrocarbons from the 2.4L engine cause the factory ceramic substrate to melt or disintegrate. This internal failure chokes exhaust gas expansion, elevates pre-converter cylinder head temperatures, reduces fuel economy, and triggers persistent MIL/CEL warnings due to degraded oxygen storage capacity.

The Engineering Solution

Engineered as a bolt-on replacement, this unit features a robust stainless steel outer housing and precision-stamped flanges that bolt directly to the factory intermediate exhaust pipes. Internally, a uniform ceramic substrate with a dense precious-metal washcoat ensures rapid light-off times and maximum surface area for chemical conversion of CO and NOx without introducing flow restriction. Built with exact factory hanger brackets and OE-positioned sensor alignment, this assembly installs without cutting or welding, providing leak-free operation and reliable exhaust flow.

Technical Specifications

Compatibility

• 2007 Kia Optima EX Sedan 4-Door 2.4L 2351CC l4 GAS DOHC Naturally Aspirated (Rear)
• 2007 Kia Optima LX Sedan 4-Door 2.4L 2351CC l4 GAS DOHC Naturally Aspirated (Rear)
• 2008 Kia Optima EX Sedan 4-Door 2.4L 2351CC l4 GAS DOHC Naturally Aspirated (Rear)
• 2008 Kia Optima LX Sedan 4-Door 2.4L 2351CC l4 GAS DOHC Naturally Aspirated (Rear)

Frequently Asked Questions

Does this fit the MG Optima?
Yes, this is a direct fit for the 2007-2008 Kia Optima equipped with the G4KC engine.

Will this converter clear an active P0420 catalytic efficiency code?
Yes, providing oxygen sensors and upstream fuel trims are operating correctly, this unit restores proper catalytic storage to clear efficiency codes.

The Kia Commuter Standard

Maintaining daily drivability and factory fuel economy requires precise exhaust backpressure and reliable emissions control that keeps sensor loops fully operational mile after mile.