Catalytic Converter for Lexus GX (2003-2005) 4.7L Front Right

Direct-Fit Front Right Catalytic Converter for 2003-2005 Lexus GX

What it Does: The Front Right Catalytic Converter replaces degraded bank 1 factory emissions equipment on the 2003-2005 Lexus GX to eliminate catalytic converter trouble codes and restore unobstructed exhaust flow.

The Stock Lexus GX Exhaust Degradation Problem

Over years of heat cycling and high mileage, the factory catalytic converter on the UZJ120 chassis suffers substrate burnout, core fracturing, and washcoat poisoning. In the 2UZ-FE 4.7L V8, degraded exhaust bricks choke cylinder scavenging, creating severe backpressure that robs low-end torque and triggers persistent P0420 diagnostic trouble codes. Neglected thermal breakdown can lead to partial substrate collapse, compromising exhaust velocity and elevating exhaust gas temperatures under heavy load.

The Engineering Solution

Engineered to exact OEM dimensional specifications, this front right direct-fit catalytic converter replaces the worn factory assembly without cutting or welding. Constructed with a heavy-gauge stainless steel casing and precision-aligned flanges, it provides superior resistance to thermal fatigue and stress cracking. Inside, a high-efficiency ceramic honeycomb substrate features a dense precious metal washcoat that chemically converts harmful carbon monoxide, hydrocarbons, and nitrogen oxides into EPA-compliant tailpipe emissions while restoring full exhaust throughput.

Technical Specifications

Compatibility

• 2003 Lexus GX470 Base Sport Utility 4-Door 4.7L 4663CC V8 GAS DOHC Naturally Aspirated
• 2004 Lexus GX470 Base Sport Utility 4-Door 4.7L 4663CC V8 GAS DOHC Naturally Aspirated
• 2005 Lexus GX470 Base Sport Utility 4-Door 4.7L 4663CC V8 GAS DOHC Naturally Aspirated

Frequently Asked Questions

Does this fit the UZJ120 GX?
Yes, this is a direct fit for the 2003-2005 Lexus GX equipped with the 2UZ-FE engine.

Will this clear a catalyst system efficiency (P0420) check engine light?
Yes, installing this EPA-compliant converter restores factory conversion efficiency to resolve diagnostic trouble codes associated with substrate degradation.

The Lexus GX Durability Standard

Engineered for the heavy mechanical demands of full-frame utility platforms, this converter assembly resists thermal warping, off-road vibration, and high-load towing heat to ensure long-term durability on and off the pavement.