Dorman 673-9591 Catalytic Converter with Integrated Exhaust Manifold

Dorman 673-9591 Catalytic Converter Manifold

Dorman 673-9591 is a catalytic converter with integrated exhaust manifold for specific Nissan applications. It is built to match original equipment fit and function, with CARB certification for California emissions applications.

Key Features

• Integrated exhaust manifold and catalytic converter design
• Stainless steel converter body with natural finish
• CARB certified with Executive Order D-798-5
• One inlet, one outlet, and two sensor ports
• Flanged outlet with included inlet gasket and outlet gasket
• Fits select 2002, 2004-2006 Nissan Sentra and 2004-2006 Nissan Altima applications

Detailed Description

This manifold converter is precision-engineered as an OE-style replacement for vehicles that use a combined exhaust manifold and catalytic converter assembly. The stainless steel construction supports durability in high-heat exhaust service, while the flanged outlet and oval inlet mounting pattern help maintain proper alignment during replacement. Dorman 673-9591 is a direct-fit solution for emissions-related exhaust repair on select Nissan Altima and Nissan Sentra models, including California emissions applications.

This part cross-references Dorman - HELP 83397 for the same application.

Common Repair Uses

• Check engine light caused by catalytic converter efficiency issues
• Exhaust manifold cracking or leakage at the manifold converter assembly
• Failed emissions inspection on CARB-regulated vehicles
• Exhaust noise from a leaking manifold-to-pipe connection
• Sensor port or flange sealing problems in the exhaust stream

Installation Notes and Tips

Verify vehicle emissions configuration before ordering, especially for California emissions applications. Confirm the inlet and outlet mounting patterns, sensor port count, and overall length against the original assembly. Use the included inlet gasket and outlet gasket during installation, and follow factory torque and sealing procedures to help prevent exhaust leaks.

Quality Assurance

Dorman designs this manifold converter to match original equipment specifications for the listed Nissan applications. CARB certification and Executive Order D-798-5 support use on approved California emissions vehicles.