Catalytic Converter for Infiniti QX56 (2004-2010) 5.6L Left & Right

Direct-Fit Catalytic Converter Set for 2004-2010 Infiniti QX56

What it Does: The Left & Right Catalytic Converter Set replaces deteriorated factory catalytic converters on the 2004-2010 Infiniti QX56 to restore proper exhaust velocity, clear catalyst efficiency trouble codes, and ensure federal emissions compliance.

The Stock Infiniti QX56 Catalyst Breakdown and Reversion Risk

The factory exhaust manifolds and integrated catalytic converters on the JA60 platform suffer from severe thermal cycling fatigue. Over extended heat cycles and high-load towing conditions, the OEM ceramic washcoat degrades, causing core dusting, micro-fractures, and structural collapse. On the VK56DE engine, exhaust valve overlap can draw abrasive ceramic dust back into the combustion chambers via reversion, causing catastrophic cylinder wall scoring and oil consumption alongside recurring P0420 and P0430 DTCs.

The Engineering Solution

This Left & Right direct-fit assembly utilizes high-grade tubular 409 stainless steel shells engineered to resist corrosion and thermal warping. The high-porosity ceramic honeycomb substrate features an optimal precious metal washcoat loading that ensures reliable catalytic reduction without creating restrictive exhaust backpressure. Precision laser-cut flanges, mandrel-bent primary pipe sections, and factory-positioned O2 sensor bungs allow a bolt-on installation to OEM downpipes and manifolds with no cutting or custom fabrication required.

Technical Specifications

Compatibility

• 2004 Infiniti QX56 Base 5.6L V8 (VK56DE)
• 2005 Infiniti QX56 Base 5.6L V8 (VK56DE)
• 2006 Infiniti QX56 Base 5.6L V8 (VK56DE)
• 2007 Infiniti QX56 Base 5.6L V8 (VK56DE)
• 2008 Infiniti QX56 Base 5.6L V8 (VK56DE)
• 2009 Infiniti QX56 Base 5.6L V8 (VK56DE)
• 2010 Infiniti QX56 Base 5.6L V8 (VK56DE)

Frequently Asked Questions

Does this fit the JA60 QX56?
Yes, this is a direct fit for the 2004-2010 Infiniti QX56 equipped with the VK56DE engine.

Will this resolve P0420 and P0430 diagnostic trouble codes?
Yes, properly installing these high-efficiency converters will restore emissions parameters and eliminate catalyst efficiency fault codes under EPA federal compliance standards.

The Infiniti Durability Standard

Engineered to handle the heavy towing demands and sustained thermal loads of full-size luxury utility platforms, this assembly delivers factory-spec flow dynamics, precise backpressure balance, and long-term mechanical reliability.