Walker 83443 Catalytic Converter - Left or Rear Left

Walker CalCat Direct-Fit Catalytic Converter

Walker CalCat 83443 is a direct-fit catalytic converter built for specific Nissan and Infiniti applications from 2004-2006. It is CARB certified and engineered for an OE-style fit on the rear left exhaust position, making it a practical replacement for emissions-related service on supported vehicles.

Key Features

• Direct-fit, specific-fit design for easier replacement
• CARB certified for regulated emissions applications
• Stainless steel body with a ceramic substrate
• Round converter body with 2-bolt welded flange inlet and outlet
• Single-converter design with pre-catalyst oxygen sensor location
• Overall length: 29.25 in.; body length: 8 in.; body height and width: 4.02 in.
• Walker CalCat line for OE-style replacement fitment

Product Details

The Walker CalCat product line focuses on direct-fit catalytic converters that match the original exhaust layout more closely than universal replacements. Part number 83443 is designed, tested, and validated to meet CARB standards, and it is listed for 2004-2006 Nissan Titan, Nissan Armada, Nissan Pathfinder Armada, and Infiniti QX56 applications in the rear left position. This part cross-references no listed interchange numbers in the provided data.

Compatible vehicle coverage includes 2004-2006 Nissan Titan, rear left; 2005-2006 Nissan Armada, rear left; 2004 Nissan Pathfinder Armada, rear left; and 2004-2006 Infiniti QX56, rear left. For search relevance, this is a common choice for Nissan Titan catalytic converter replacement, Nissan Armada rear left converter service, and Infiniti QX56 CARB-compliant exhaust repair.

Common Issues This Part Can Address

• Failed emissions testing due to a worn or inefficient converter
• Check engine light related to catalyst efficiency codes
• Restricted exhaust flow from a deteriorated substrate
• Corrosion or damage in the original rear left converter assembly
• Need for a CARB-certified replacement on supported vehicles

Installation Notes

Installation requires attention to the listed fitment notes and vehicle-specific emissions configuration. Additional parts 31576 and 31540 are required to complete installation on the listed applications, and an exhaust gasket is recommended on certain 2004-2006 Nissan Titan configurations. Mounting hardware is not included. Verify the engine family number and emissions certification before ordering, especially for California and other CARB-regulated states.

Quality Assurance

Walker CalCat catalytic converters are designed, tested, and validated for CARB compliance and OE-style fitment. Part number 83443 is a CARB-certified replacement converter for the specified applications and is built with a stainless steel body and ceramic substrate for emissions-system service.