Catalytic Converter for Infiniti QX80 (2014-2021) 5.6L Left & Right

Direct-Fit Stainless Steel Catalytic Converter Set for 2014-2021 Infiniti QX80 (Z62)

What it Does: The catalytic converter set replaces deteriorated factory manifolds and exhaust bricks on the 2014-2021 QX80 to clear persistent catalyst efficiency trouble codes and restore non-restricted exhaust gas velocity.

The Stock Infiniti QX80 Substrate Breakdown

Factory catalytic converters on the Z62 chassis suffer premature thermal degradation under prolonged heavy loads and towing duty cycles. Sustained exhaust gas temperatures (EGTs) from the high-displacement direct-injected VK56VD engine cause the original ceramic substrate to micro-fracture, glaze, and eventually crumble. This internal disintegration triggers continuous downstream sensor voltage deviations, setting diagnostic trouble codes P0420 and P0430, while loose monolith chunks create internal baffling rattles and increase exhaust backpressure.

The Engineering Solution

This direct-replacement converter assembly features heavy-gauge stainless steel tubing and welded outer body construction engineered to endure severe heat cycling without fatigue cracking. Internally, a dense washcoat of platinum, palladium, and rhodium over a high-flow ceramic honeycomb ensures rapid light-off and optimal catalytic reduction of HC, CO, and NOx emissions. Integrated, precision-located factory oxygen sensor bungs and CNC-machined mating flanges provide a leak-free bolt-on installation that mirrors OEM exhaust geometry without modification.

What's Included

• 1 x Left-side direct-fit catalytic converter
• 1 x Right-side direct-fit catalytic converter
• Flange gasket(s)
• Mounting hardware

Technical Specifications

Compatibility

• 2014-2021 Infiniti QX80 Base 5.6L V8
• 2014-2021 Infiniti QX80 Luxe 5.6L V8
• 2014-2021 Infiniti QX80 Limited 5.6L V8
• 2014-2021 Infiniti QX80 ProACTIVE 5.6L V8
• 2014-2021 Infiniti QX80 Sensory 5.6L V8
• 2014-2021 Infiniti QX80 Premium Select 5.6L V8

Frequently Asked Questions & Fitment Warnings

Does this fit the Z62 QX80?

Yes, this is a direct fit for the 2014-2021 Infiniti QX80 equipped with the VK56VD 5.6L V8 engine. Non-compliant for sale or operation in California, New York, Maine, or Colorado (EPA 49-state compliant only; not CARB certified).

Will this require ECU recalibration or welding during installation?

No, this assembly is engineered to bolt directly to OEM exhaust flanges and utilizes standard factory oxygen sensors without ECU flashing.

The Infiniti Heavy-Duty Caliber

Engineered to handle the high thermal stress of towing and full-throttle hauling, this emissions assembly restores factory flow efficiency and exhaust scavenging under demanding full-size SUV operating conditions.