
Dorman 674-294 Catalytic Converter with Integrated Exhaust Manifold
Dorman 674-294 Catalytic Converter Manifold
Dorman 674-294 is a catalytic converter with integrated exhaust manifold for specific 2009-2010 Hummer H3 and H3T applications. This one-piece manifold converter is built to match original equipment fit and function, with a ceramic substrate and flanged inlet and outlet connections.
Key Features
- Integrated exhaust manifold and catalytic converter design
- Precision-engineered OE-style replacement for select Hummer applications
- Ceramic substrate material
- Flanged inlet and outlet for secure exhaust connection
- Includes inlet gasket, outlet gasket, and mounting hardware
- Natural finish and natural color
- Two sensor ports for factory-style exhaust system integration
Detailed Description
This Dorman manifold converter is made for direct replacement on 2009-2010 Hummer H3 and 2009-2010 Hummer H3T models. Part number 674-294 combines the exhaust manifold and catalytic converter into a single assembly, helping restore proper exhaust routing and emissions control in the original equipment layout. The unit uses a ceramic converter body and flanged connections, with a rectangle inlet port shape and round outlet port shape.
For buyers searching for a 2009 Hummer H3 catalytic converter manifold, a 2010 Hummer H3T exhaust manifold converter, or Dorman 674-294 OE replacement exhaust parts, this part is built around the factory-style configuration. It cross-references GM 12619749 for the same application.
What It Helps Address
- Cracked or leaking exhaust manifold assembly
- Failed catalytic converter performance
- Exhaust leaks at the manifold or flange joints
- Check engine light concerns related to catalyst efficiency or exhaust sealing
- Loss of factory exhaust fitment after manifold damage
Installation Notes
Verify the vehicle’s year, model, and exhaust configuration before installation. This part uses flanged inlet and outlet connections and includes gaskets and mounting hardware for the listed application. Confirm sensor port alignment and match the factory exhaust manifold layout on 2009-2010 Hummer H3 and H3T models before final assembly.
Quality Assurance
Dorman engineers this manifold converter to match original equipment specifications for the listed vehicles. The design follows the factory-style one-piece layout used on select Hummer H3 and H3T applications.
Original: $816.01
-65%$816.01
$285.60Dorman 674-294 Catalytic Converter with Integrated Exhaust Manifold
Dorman 674-294 Catalytic Converter Manifold
Dorman 674-294 is a catalytic converter with integrated exhaust manifold for specific 2009-2010 Hummer H3 and H3T applications. This one-piece manifold converter is built to match original equipment fit and function, with a ceramic substrate and flanged inlet and outlet connections.
Key Features
- Integrated exhaust manifold and catalytic converter design
- Precision-engineered OE-style replacement for select Hummer applications
- Ceramic substrate material
- Flanged inlet and outlet for secure exhaust connection
- Includes inlet gasket, outlet gasket, and mounting hardware
- Natural finish and natural color
- Two sensor ports for factory-style exhaust system integration
Detailed Description
This Dorman manifold converter is made for direct replacement on 2009-2010 Hummer H3 and 2009-2010 Hummer H3T models. Part number 674-294 combines the exhaust manifold and catalytic converter into a single assembly, helping restore proper exhaust routing and emissions control in the original equipment layout. The unit uses a ceramic converter body and flanged connections, with a rectangle inlet port shape and round outlet port shape.
For buyers searching for a 2009 Hummer H3 catalytic converter manifold, a 2010 Hummer H3T exhaust manifold converter, or Dorman 674-294 OE replacement exhaust parts, this part is built around the factory-style configuration. It cross-references GM 12619749 for the same application.
What It Helps Address
- Cracked or leaking exhaust manifold assembly
- Failed catalytic converter performance
- Exhaust leaks at the manifold or flange joints
- Check engine light concerns related to catalyst efficiency or exhaust sealing
- Loss of factory exhaust fitment after manifold damage
Installation Notes
Verify the vehicle’s year, model, and exhaust configuration before installation. This part uses flanged inlet and outlet connections and includes gaskets and mounting hardware for the listed application. Confirm sensor port alignment and match the factory exhaust manifold layout on 2009-2010 Hummer H3 and H3T models before final assembly.
Quality Assurance
Dorman engineers this manifold converter to match original equipment specifications for the listed vehicles. The design follows the factory-style one-piece layout used on select Hummer H3 and H3T applications.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
Dorman 674-294 Catalytic Converter Manifold
Dorman 674-294 is a catalytic converter with integrated exhaust manifold for specific 2009-2010 Hummer H3 and H3T applications. This one-piece manifold converter is built to match original equipment fit and function, with a ceramic substrate and flanged inlet and outlet connections.
Key Features
- Integrated exhaust manifold and catalytic converter design
- Precision-engineered OE-style replacement for select Hummer applications
- Ceramic substrate material
- Flanged inlet and outlet for secure exhaust connection
- Includes inlet gasket, outlet gasket, and mounting hardware
- Natural finish and natural color
- Two sensor ports for factory-style exhaust system integration
Detailed Description
This Dorman manifold converter is made for direct replacement on 2009-2010 Hummer H3 and 2009-2010 Hummer H3T models. Part number 674-294 combines the exhaust manifold and catalytic converter into a single assembly, helping restore proper exhaust routing and emissions control in the original equipment layout. The unit uses a ceramic converter body and flanged connections, with a rectangle inlet port shape and round outlet port shape.
For buyers searching for a 2009 Hummer H3 catalytic converter manifold, a 2010 Hummer H3T exhaust manifold converter, or Dorman 674-294 OE replacement exhaust parts, this part is built around the factory-style configuration. It cross-references GM 12619749 for the same application.
What It Helps Address
- Cracked or leaking exhaust manifold assembly
- Failed catalytic converter performance
- Exhaust leaks at the manifold or flange joints
- Check engine light concerns related to catalyst efficiency or exhaust sealing
- Loss of factory exhaust fitment after manifold damage
Installation Notes
Verify the vehicle’s year, model, and exhaust configuration before installation. This part uses flanged inlet and outlet connections and includes gaskets and mounting hardware for the listed application. Confirm sensor port alignment and match the factory exhaust manifold layout on 2009-2010 Hummer H3 and H3T models before final assembly.
Quality Assurance
Dorman engineers this manifold converter to match original equipment specifications for the listed vehicles. The design follows the factory-style one-piece layout used on select Hummer H3 and H3T applications.












