Dorman 673-959 Catalytic Converter with Integrated Exhaust Manifold

Dorman 673-959 Catalytic Converter Manifold

Dorman 673-959 is a catalytic converter with integrated exhaust manifold for specific Nissan applications. It is built to match original equipment fit and function for a direct replacement on CARB-compliant vehicles.

• Integrated exhaust manifold and catalytic converter design
• Stainless steel converter body
• CARB certified with Executive Order D-665-23
• Natural finish with oval inlet port shape
• Includes inlet gasket and outlet mounting hardware
• Direct-fit replacement for select Nissan Sentra and Nissan Altima models

OE-Style Replacement Details

This manifold converter is precision-engineered for the original equipment layout on 2003-2005 Nissan Sentra and 2002-2003 Nissan Altima. The Dorman 673-959 is built for vehicles that require a CARB-certified exhaust manifold converter, helping maintain proper exhaust routing and emissions system operation while matching the factory-style configuration.

This part cross-references MagnaFlow Exhaust Products 452019 and Walker Exhaust 82554 for the same application.

Common Issues This Part Addresses

• Cracked or leaking exhaust manifold assembly
• Failed catalytic converter causing emissions test concerns
• Exhaust leaks at the manifold or flange connection
• Corrosion-related damage to the original manifold converter
• Check engine light concerns tied to exhaust aftertreatment performance

Installation Notes

Verify vehicle year, make, model, and emissions requirements before installation. This part includes an inlet gasket, flange gasket, studs, nuts, and outlet mounting hardware as listed in the product data. Confirm the oval inlet port and 8-hole outlet mounting pattern match the original assembly before beginning service.

For best results, inspect adjoining exhaust components, fasteners, and sealing surfaces for wear or damage during replacement. Dorman 673-959 is listed for 2003-2005 Nissan Sentra and 2002-2003 Nissan Altima applications.

Quality Assurance

Dorman manufactures this manifold converter as a regular-grade replacement part with stainless steel construction and CARB certification for the specified applications. The OE-style design and listed Executive Order D-665-23 support emissions-compliant replacement on approved Nissan Sentra and Nissan Altima vehicles.