Catalytic Converter for Land Rover Range Rover (2014-2019) 5.0L Supercharged

Direct-Fit Catalytic Converters for 2014-2019 Land Rover Range Rover (AJ133 / L405)

What it is for: This high-quality stainless steel Federal EPA-compliant catalytic converter assembly restores emissions compliance and proper exhaust flow for L405 and L494 chassis Range Rovers experiencing OEM catalyst failure.

The Stock AJ133 Exhaust Bottleneck

OEM catalytic converters on the supercharged 5.0L AJ133 V8 endure extreme thermal loads. The forced-induction setup and factory ignition timing push exhaust gas temperatures (EGTs) to the absolute limit. Over extended heat cycles, the factory ceramic substrate becomes brittle, often degrading, cracking, or melting into a highly restrictive block. This creates excessive exhaust backpressure that chokes supercharger efficiency, drastically increases cylinder head temperatures, and inevitably triggers stubborn P0420 or P0430 diagnostic trouble codes while robbing the heavy L405 chassis of essential low-end torque.

The Engineering Solution

This replacement assembly solves factory failure points by utilizing a high-grade stainless steel outer shell designed to survive extreme thermal expansion and corrosion in harsh winter or wet environments. Inside, a high-efficiency catalyst matrix maximizes the oxidation-reduction chemical reaction to scrub CO, HC, and NOx from the exhaust stream effectively. Crucially, the internal core features a high-flow cell architecture that drops backpressure behind the exhaust manifolds. Lowering backpressure actively reduces heat soak and restores the aggressive exhaust velocity the 5.0L supercharged engine requires, all while ensuring a long service life.

Technical Specifications

Compatibility

• 2014-2019 Land Rover Range Rover 5.0L
• 2015-2019 Land Rover Range Rover Sport 5.0L
• Note: Federal (EPA) compliant part. Not legal for use or registration in CA, NY, CO & ME.

The Land Rover Standard

High-output European SUVs require precise emissions management to keep the ECU synchronized and the dash free of Check Engine Lights. This direct-fit catalytic converter guarantees reliable emissions control and restores optimal breathing for your premium 4x4.