Walker 83554 Catalytic Converter - Right

Walker CalCat 83554 Catalytic Converter

Walker CalCat 83554 is a direct-fit catalytic converter built for CARB-compliant replacement on select Lincoln Navigator applications. It is engineered for the right-side position on 2003-2004 Lincoln Navigator models and is designed to deliver an OE-style fit for emissions repair work.

The Walker CalCat line focuses on direct-fit replacement converters for OBDII and non-OBD vehicles, with CARB-certified coverage where required. Part number 83554 is a fitment-specific solution for Lincoln Navigator owners needing a replacement catalytic converter that matches the original exhaust layout.

Key Features

• Direct-fit catalytic converter for specific Lincoln Navigator applications
• CARB certified for sale and use in California and other CARB-requiring states
• Fits 2003-2004 Lincoln Navigator, right
• Stainless steel body with ceramic substrate
• Small oval and round body shape for OE-style packaging
• Pre- and post-catalyst oxygen sensor location support
• 2.5 in inlet inside diameter and 2.78 in outlet outside diameter
• Walker CalCat 83554 for emissions-related exhaust replacement

Product Details

Walker CalCat 83554 is a specific-fit catalytic converter for the right side of the 2003 and 2004 Lincoln Navigator. It uses a 2-bolt loose flange with spherical flare and pipe connection at the inlet, along with a 2-bolt loose flange outlet, to match the factory exhaust routing as closely as possible. The stainless steel body and ceramic substrate are selected for standard replacement use in emissions service, while CARB Executive Order D-182-69 confirms legal use in California and other states that follow CARB replacement converter rules.

This part cross-references Walker 83554 for the same application.

Common Repair Uses

• Replacing a failed or restricted catalytic converter on a 2003-2004 Lincoln Navigator, right
• Addressing emissions test failure related to catalyst efficiency
• Correcting exhaust flow issues caused by a damaged converter core
• Restoring proper OBDII catalyst monitoring on applicable vehicles
• Repairing exhaust leaks at the converter connection points

Installation Notes

Verify the vehicle year, engine family number, and right-side fitment before ordering. This converter uses specific inlet and outlet flange connections, so confirm the exhaust pipe configuration matches the original equipment layout. Because mounting hardware is not listed as included, plan to reuse or source any required installation components separately. After installation, clear diagnostic trouble codes and verify there are no exhaust leaks.

Quality Assurance

Walker CalCat converters are designed, tested, and validated for CARB compliance on approved applications. Part number 83554 is built for direct-fit replacement use on the listed Lincoln Navigator fitments and carries CARB Executive Order D-182-69 for the covered applications.