Catalytic Converter for Land Rover LR4 (2010-2013) 5.0L

Direct-Fit Stainless Catalytic Converter Set for 2010-2013 Land Rover LR4 (L319)

What it Does: This direct-fit catalytic converter set bolts onto the 2010-2013 Land Rover LR4 (L319) AJ133 5.0L V8 to restore exhaust flow and eliminate catalyst-efficiency fault codes.

The Stock Land Rover LR4 Catalyst Failure

Over high-mileage thermal cycling, the factory converters on the L319 chassis equipped with the AJ133 5.0L V8 suffer from severe heat soak and ceramic substrate degradation. Minor fuel trim deviations or misfires overheat the precious-metal washcoat, fracturing the internal monolith and restricting exhaust flow. Once oxygen storage capacity drops below factory ECU thresholds, the downstream sensors immediately trigger P0420 and P0430 catalyst-efficiency codes.

Common Symptoms of a Failing OEM Catalytic Converter

• OBD-II Faults: Stored P0420 or P0430 codes caused by depleted catalyst washcoat efficiency.
• Substrate Rattle: Metallic clatter beneath the floorpan from a fractured ceramic honeycomb shifting inside the shell.
• Exhaust Restriction: Sluggish throttle response under load and failed OBD-II emissions readiness testing.

The Direct-Fit Stainless Catalytic Converter Solution

Built with corrosion-resistant stainless steel shells and piping, this dual-pipe set replaces both banks simultaneously to balance exhaust scavenging across the AJ133 5.0L V8. Each 8-inch by 5-inch converter houses a high-efficiency ceramic honeycomb substrate with a precious-metal washcoat to neutralize HC, CO, and NOx. Factory-style bolt flanges and integrated post-catalyst O2 sensor bungs ensure leak-free, direct bolt-on installation without cutting or welding.

What's Included

• 2 x Catalytic Converter Pipes (Bank 1 & Bank 2 Direct-Fit Set)

Technical Specifications

Compatibility

• 2010-2013 Land Rover LR4 Base (AJ133 5.0L V8)
• 2010-2013 Land Rover LR4 SE (AJ133 5.0L V8)
• 2010-2013 Land Rover LR4 HSE (AJ133 5.0L V8)
• 2010-2013 Land Rover LR4 HSE Lux (AJ133 5.0L V8)

Frequently Asked Questions & Fitment Warnings

Does this fit the L319 LR4?

Yes. This is a direct fit for the 2010-2013 Land Rover LR4 equipped with the AJ133 5.0L V8 engine. Excludes 2014-2016 LR4 3.0L supercharged V6, Range Rover, and Range Rover Sport models; EPA Federal only—not CARB approved or legal for California, New York, Colorado, or Maine.

Will this clear P0420/P0430 codes, and are O2 sensors included?

Yes, when triggered by worn catalysts; O2 sensors are not included. Replacing both converters restores conversion efficiency on the L319 to clear P0420/P0430 codes; transfer functional existing O2 sensors or install new units after checking for exhaust leaks.

What prep is required for a leak-free bolt-on installation?

Let the exhaust cool fully and apply penetrating oil to flange bolts before removal. Install both converter pipes with new flange gaskets, torque fasteners evenly, and check every joint for leaks once idling.

The Land Rover Precision Standard

Engineered for exact ECU sensor calibration on the L319 platform, this stainless converter pair restores CEL-free operation. Expect durable thermal resistance and clean federal emissions compliance without exhaust restriction.