Dorman 674-879 Catalytic Converter with Integrated Exhaust Manifold

OE-Style Manifold Catalytic Converter

Dorman 674-879 is a catalytic converter with integrated exhaust manifold for specific Subaru applications. It is built as a one-piece, flanged replacement with a ceramic substrate and stainless steel converter body to match the original equipment layout on select 2015-2019 Subaru Legacy and Subaru Outback models.

For buyers searching for a 2015-2019 Subaru Legacy catalytic converter manifold or a 2015-2019 Subaru Outback exhaust manifold converter, this part number 674-879 provides the correct OE-style configuration for direct replacement service.

• Integrated exhaust manifold and catalytic converter design
• One-piece construction with flanged inlet and outlet connections
• Ceramic substrate material
• Stainless steel converter body
• Two sensor ports
• Outlet gasket and outlet mounting hardware included
• Natural finish, regular grade type

Fitment Details

Compatible with:

• Fits 2015-2019 Subaru Legacy, N/A
• Fits 2015-2019 Subaru Outback, N/A

What This Part Helps Address

• Cracked or leaking exhaust manifold converter assembly
• Restricted exhaust flow from a worn catalytic substrate
• Exhaust odor caused by a failing converter seal or housing
• Check engine light concerns related to catalyst efficiency or sensor readings
• Noise from a damaged manifold-to-exhaust connection

Installation Notes

Verify flange alignment, sensor port placement, and gasket surfaces before installation. This unit uses two inlet mounting holes and three outlet mounting holes, with a round inlet and round outlet port shape. The package includes an inlet gasket, outlet gasket, studs, nuts, bolts, and washers as listed in the product data; inlet mounting hardware is not included.

Part number 674-879 cross-references 44620AD82A for the same application.

Quality Assurance

Dorman engineers this manifold converter to match original equipment dimensions and mounting points on the listed Subaru Legacy and Subaru Outback applications. It is not CARB certified and is not New York certified.