Dorman 672-8491 Catalytic Converter with Integrated Exhaust Manifold - Rear

Dorman 672-8491 Catalytic Converter Manifold

Dorman 672-8491 is a catalytic converter with integrated exhaust manifold for specific Honda and Acura rear applications. It is built as a standard replacement in stainless steel with a ceramic substrate, flanged inlet and outlet, and an attached heat shield for direct-fit service on the listed vehicles.

Key Features

• Integrated exhaust manifold and catalytic converter design
• Specific fit replacement for listed rear applications
• Stainless steel construction with uncoated metallic gray finish
• Ceramic substrate material
• Flanged inlet and outlet connections
• Heat shield attached
• CARB certified for the listed applications
• Inlet gasket included

Detailed Description

This Dorman manifold converter is engineered to match original equipment dimensions and connection points for the specified vehicles. The one-piece design uses a stainless steel body with a cylindrical converter section, flanged inlet and outlet, and a 2-inch inlet with a 3-inch outlet. It is a direct replacement for rear-position exhaust service on 2003-2009 Acura MDX, 2005-2010 Honda Odyssey, 2005-2008 Honda Pilot, and 2006-2008 Honda Ridgeline. This part number, 672-8491, is also referenced for OE-style replacement needs where the original manifold converter has failed or no longer seals correctly.

This part cross-references MagnaFlow Exhaust Products (e.g., 5582741) for the same application.

Vehicle Fitment

• Fits 2005-2010 Honda Odyssey, rear
• Fits 2003-2009 Acura MDX, rear
• Fits 2005-2008 Honda Pilot, rear
• Fits 2006-2008 Honda Ridgeline, rear

Common Issues This Part Can Address

• Failed catalytic converter efficiency on the rear exhaust section
• Exhaust leaks at the manifold-to-pipe connection
• Cracked or corroded integrated manifold housing
• Check engine light related to catalyst performance codes
• Damaged flange sealing surfaces or gasket leakage

Installation Notes and Tips

Verify the vehicle year, make, model, and rear-position application before ordering. Inspect the mating flanges, gasket surface, and exhaust hang points during removal, and confirm the inlet and outlet diameters match the existing exhaust layout. Because this is a specific-fit manifold converter, proper alignment with the factory exhaust routing is important for sealing and clearance.

Quality Assurance

Dorman manufactures this replacement as a standard OE-style solution for the listed applications, with CARB certification noted for the covered vehicles. The stainless steel construction, ceramic substrate, and integrated heat shield support a direct replacement approach for 2003-2010 Honda and Acura rear exhaust service.