Dorman 674-078 Catalytic Converter

OE-Style Catalytic Converter Replacement

Dorman 674-078 is a specific-fit catalytic converter built for direct replacement on select Ford Fusion and Lincoln MKZ applications. It is engineered to match original equipment fit and function, with a stainless steel body, ceramic substrate, flanged connections, and integrated heat shielding for a service-ready exhaust repair.

Key Features

• Specific-fit catalytic converter for select 2013-2016 Ford Fusion and 2013-2016 Lincoln MKZ applications
• Stainless steel body with ceramic substrate
• Flanged inlet and outlet for OE-style exhaust connection
• Heat shield attached for added thermal protection
• Includes inlet and outlet gaskets plus mounting hardware
• Two sensor ports for the original exhaust configuration
• Standard replacement grade for direct-fit service work

Detailed Description

This Dorman catalytic converter, part number 674-078, is made for direct replacement on specific vehicle years, makes, and models rather than universal use. It features a cylindrical body, 2.75-inch inlet inside diameter, 3.125-inch outlet outside diameter, and flanged inlet and outlet ends to match the factory exhaust layout. The unit is built with a stainless steel shell and ceramic substrate, and it includes a heat shield attached to help maintain proper underbody protection. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

• Failed catalytic converter efficiency codes
• Exhaust restriction from a damaged or deteriorated converter
• Rattling or broken internal substrate material
• Exhaust leaks at the converter flange connections
• Check engine light concerns related to emissions system performance

Installation Notes and Tips

Verify the vehicle’s year, make, model, and emissions configuration before installation. This part is not CARB compliant and is not California Air Resources Board certified. Confirm sensor port alignment, flange orientation, and gasket seating during installation to help ensure a proper exhaust seal on Ford Fusion and Lincoln MKZ applications. Part number 674-078 is intended for direct-fit replacement service on the listed vehicles.

Quality Assurance

Dorman designs this catalytic converter as a standard replacement part that matches original equipment fit and function on the specified applications. The construction, included gaskets, and mounting hardware support a complete repair approach for compatible Ford Fusion and Lincoln MKZ exhaust systems.