Finish Selecting Your Vehicle to Shop For Your Catalytic Converter

Choose a Year for your Hummer 's Catalytic Converter

  • 2010
  • 2009
  • 2008
  • 2007
  • 2006
  • 2005
  • 2004
  • 2003

Shop By Brand

The Following brands are available based on your search.

  • Bosal
    Bosal
  • Davico Converters
    Davico Converters
  • Eastern Catalytic
    Eastern Catalytic
  • Magnaflow
    Magnaflow
  • Original Performance
    Original Performance
  • Walker
    Walker

Best Selling Genuine Hummer Catalytic Converters

  • We Stock the following top leading brands, including Davico Converters, Magnaflow, Bosal, Eastern Catalytic, Walker
  • Constantly Updated Inventory of Hummer Replacement Catalytic Converter Parts

We stock Catalytic Converter parts for most Hummer models, including H2, H3.


Davico Converters
Qty:
322.75
Davico Converters Catalytic Converter  Left
  • Direct Fit Catalytic Converter
  • Legal Note: Not For Sale or Use in the state of California & NY (vehicles with California Emissions)
  • Exact-Fit Catalytic Converter
  • Davico Exact-Fit Catalytic Converters are designed using the original equipment sample parts so that we make sure they fit and function properly on your vehicle. Our parts utilize only high quality emissions reducing catalyst specifically designed to meet the demands of current OBDII vehicles.
Brand: Davico Converters
Position: Left
Additional Fitment Information:
Vehicle Position Block Engine CID CC
2009 - Hummer H3 Left V 8 Cyl 5.3L 325 5328
Davico Converters
Qty:
327.53
Davico Converters Catalytic Converter  Front
  • Direct Fit Catalytic Converter
  • ; Not legal for use in California Illegal for installation in NY on vehicles equipped with California emission systems Manifold Converter
  • Exact-Fit Manifold Catalytic Converter
  • Product Attributes:
    • Gaskets Included: Yes
    • Height: 7.5
    • Large Pkg. Fee: No
    • Number Of O2 Sensors: 2
    • Over All Length: 18.5
    • Packaging Type: Unboxed
    • Use Davico Decarbonizing Induction Kit 1540ea: Yes
  • Davico Exact-Fit Catalytic Converters are designed using the original equipment sample parts so that we make sure they fit and function properly on your vehicle. Our parts utilize only high quality emissions reducing catalyst specifically designed to meet the demands current OBDII vehicles.
Brand: Davico Converters
Position: Front
Additional Fitment Information:
Vehicle Position Block Engine CID CC
2007 - Hummer H3 Front L 5 Cyl 3.7L 223 3654
Davico Converters
Qty:
374.46
Davico Converters Catalytic Converter  Left
  • Direct Fit Catalytic Converter
  • ; Not legal for use in California Illegal for installation in NY on vehicles equipped with California emission systems
  • Exact-Fit Catalytic Converter
  • Product Attributes:
    • Gaskets Included: Yes
    • Height: 14
    • Large Pkg. Fee: Yes
    • Number Of O2 Sensors: 2
    • Over All Length: 44
    • Packaging Type: Unboxed
    • Use Davico Decarbonizing Induction Kit 1540ea: Yes
    • Width: 27
  • Davico Exact-Fit Catalytic Converters are designed using the original equipment sample parts so that we make sure they fit and function properly on your vehicle. Our parts utilize only high quality emissions reducing catalyst specifically designed to meet the demands current OBDII vehicles.
Brand: Davico Converters
Position: Left
Additional Fitment Information:
Vehicle Position Block Engine CID CC
2006 - Hummer H2 Left V 8 Cyl 6.0L 364 5967
Davico Converters
Qty:
350.77
Davico Converters Catalytic Converter  Right
  • Direct Fit Catalytic Converter
  • ; Not legal for use in California Illegal for installation in NY on vehicles equipped with California emission systems
  • Exact-Fit Catalytic Converter
  • Product Attributes:
    • Number Of O2 Sensors: 2
    • Over All Length: 40in.
    • Packaging Type: Boxed
    • Use Davico Decarbonizing Induction Kit 1540ea: Yes
  • Davico Exact-Fit Catalytic Converters are designed using the original equipment sample parts so that we make sure they fit and function properly on your vehicle. Our parts utilize only high quality emissions reducing catalyst specifically designed to meet the demands current OBDII vehicles.
Brand: Davico Converters
Position: Right
Additional Fitment Information:
Vehicle Position Block Engine CID CC
2006 - Hummer H2 Right V 8 Cyl 6.0L 364 5967
Davico Converters
Qty:
459.29
Davico Converters Catalytic Converter  Right
  • Direct Fit Catalytic Converter
  • ; 2 Piece Design Legal Note: Not For Sale or Use in the state of California & NY (vehicles with California Emissions)
  • Exact-Fit Catalytic Converter
  • Product Attributes:
    • Gaskets Included: Yes
    • Height: 9
    • Inlet 1 Type: 3 Bolt Fixed Flange
    • Large Pkg. Fee: No
    • Number Of O2 Sensors: 2
    • Outlet 1 Type: 2 Bolt Fixed Flange
    • Over All Length: 53
    • Use Davico Decarbonizing Induction Kit 1540ea: Yes
    • Width: 10
  • Davico Exact-Fit Catalytic Converters are designed using the original equipment sample parts so that we make sure they fit and function properly on your vehicle. Our parts utilize only high quality emissions reducing catalyst specifically designed to meet the demands of current OBDII vehicles.
Brand: Davico Converters
Position: Right
Additional Fitment Information:
Vehicle Position Block Engine CID CC
2008 - Hummer H3 Right V 8 Cyl 5.3L 325 5328
Magnaflow
Qty:
712.74
Magnaflow Catalytic Converter  Left
  • Universal Catalytic Converter - 2.50in.
  • CARB Executive Order D-193-136 Engine Family Number 3GMXT06.0194 ; Certification Level : LEV1 LEV OE Spec Cutting and Welding Required During Installation
  • Universal Catalytic Converter - 2.50in.
  • 2.50in. Universal California OBDII Catalytic Converter
  • Product Attributes:
    • Air Tube Adaptable: No
    • Body Height: 4
    • Body Length: 13
    • Body Shape: Round
    • Body Type: Spun
    • Body Width: 4
    • Heat Shield Attached: No
    • Inlet Attachment: Weld-on
    • Inlet Diameter: 2.5
    • Inlet Orientation: Straight
    • Inlet Quantity: 1
    • Outlet Attachment: Weld-on
    • Outlet Diameter: 2.5
    • Outlet Orientation: Straight
    • Outlet Quantity: 1
    • Overall Length: 13
    • Sensor Port Count: 0
    • Series: California
    • Substrate Material: Ceramic
    • Subtitle: California / Carb Compliant
    • Title: California Universal
    • Type: Universal
Brand: Magnaflow
Position: Left
Additional Fitment Information:
Vehicle Position Block Engine CID CC
2003 - Hummer H2 Left V 8 Cyl 6.0L 364 5967
Magnaflow
Qty:
712.74
Magnaflow Catalytic Converter  Right
  • Universal Catalytic Converter - 2.50in.
  • CARB Executive Order D-193-136 Engine Family Number 3GMXT06.0194 ; Certification Level : LEV1 LEV OE Spec Cutting and Welding Required During Installation
  • Universal Catalytic Converter - 2.50in.
  • 2.50in. Universal California OBDII Catalytic Converter
  • Product Attributes:
    • Air Tube Adaptable: No
    • Body Height: 4
    • Body Length: 13
    • Body Shape: Round
    • Body Type: Spun
    • Body Width: 4
    • Heat Shield Attached: No
    • Inlet Attachment: Weld-on
    • Inlet Diameter: 2.5
    • Inlet Orientation: Straight
    • Inlet Quantity: 1
    • Outlet Attachment: Weld-on
    • Outlet Diameter: 2.5
    • Outlet Orientation: Straight
    • Outlet Quantity: 1
    • Overall Length: 13
    • Sensor Port Count: 0
    • Series: California
    • Substrate Material: Ceramic
    • Subtitle: California / Carb Compliant
    • Title: California Universal
    • Type: Universal
Brand: Magnaflow
Position: Right
Additional Fitment Information:
Vehicle Position Block Engine CID CC
2003 - Hummer H2 Right V 8 Cyl 6.0L 364 5967
Magnaflow
Qty:
712.74
Magnaflow Catalytic Converter  Left
  • Universal Catalytic Converter - 2.50in.
  • CARB Executive Order D-193-136 Engine Family Number 4GMXT06.0194 ; Certification Level : LEV1 LEV OE Spec Cutting and Welding Required During Installation
  • Universal Catalytic Converter - 2.50in.
  • 2.50in. Universal California OBDII Catalytic Converter
  • Product Attributes:
    • Air Tube Adaptable: No
    • Body Height: 4
    • Body Length: 13
    • Body Shape: Round
    • Body Type: Spun
    • Body Width: 4
    • Heat Shield Attached: No
    • Inlet Attachment: Weld-on
    • Inlet Diameter: 2.5
    • Inlet Orientation: Straight
    • Inlet Quantity: 1
    • Outlet Attachment: Weld-on
    • Outlet Diameter: 2.5
    • Outlet Orientation: Straight
    • Outlet Quantity: 1
    • Overall Length: 13
    • Sensor Port Count: 0
    • Series: California
    • Substrate Material: Ceramic
    • Subtitle: California / Carb Compliant
    • Title: California Universal
    • Type: Universal
Brand: Magnaflow
Position: Left
Additional Fitment Information:
Vehicle Position Block Engine CID CC
2004 - Hummer H2 Left V 8 Cyl 6.0L 364 5967
Magnaflow
Qty:
712.74
Magnaflow Catalytic Converter  Right
  • Universal Catalytic Converter - 2.50in.
  • CARB Executive Order D-193-136 Engine Family Number 4GMXT06.0194 ; Certification Level : LEV1 LEV OE Spec Cutting and Welding Required During Installation
  • Universal Catalytic Converter - 2.50in.
  • 2.50in. Universal California OBDII Catalytic Converter
  • Product Attributes:
    • Air Tube Adaptable: No
    • Body Height: 4
    • Body Length: 13
    • Body Shape: Round
    • Body Type: Spun
    • Body Width: 4
    • Heat Shield Attached: No
    • Inlet Attachment: Weld-on
    • Inlet Diameter: 2.5
    • Inlet Orientation: Straight
    • Inlet Quantity: 1
    • Outlet Attachment: Weld-on
    • Outlet Diameter: 2.5
    • Outlet Orientation: Straight
    • Outlet Quantity: 1
    • Overall Length: 13
    • Sensor Port Count: 0
    • Series: California
    • Substrate Material: Ceramic
    • Subtitle: California / Carb Compliant
    • Title: California Universal
    • Type: Universal
Brand: Magnaflow
Position: Right
Additional Fitment Information:
Vehicle Position Block Engine CID CC
2004 - Hummer H2 Right V 8 Cyl 6.0L 364 5967
Magnaflow
Qty:
712.74
Magnaflow Catalytic Converter  Left
  • Universal Catalytic Converter - 2.50in.
  • CARB Executive Order D-193-136 Engine Family Number 5GMXT06.0194 ; Certification Level : LEV1 LEV OE Spec Cutting and Welding Required During Installation
  • Universal Catalytic Converter - 2.50in.
  • 2.50in. Universal California OBDII Catalytic Converter
  • Product Attributes:
    • Air Tube Adaptable: No
    • Body Height: 4
    • Body Length: 13
    • Body Shape: Round
    • Body Type: Spun
    • Body Width: 4
    • Heat Shield Attached: No
    • Inlet Attachment: Weld-on
    • Inlet Diameter: 2.5
    • Inlet Orientation: Straight
    • Inlet Quantity: 1
    • Outlet Attachment: Weld-on
    • Outlet Diameter: 2.5
    • Outlet Orientation: Straight
    • Outlet Quantity: 1
    • Overall Length: 13
    • Sensor Port Count: 0
    • Series: California
    • Substrate Material: Ceramic
    • Subtitle: California / Carb Compliant
    • Title: California Universal
    • Type: Universal
Brand: Magnaflow
Position: Left
Additional Fitment Information:
Vehicle Position Block Engine CID CC
2005 - Hummer H2 Left V 8 Cyl 6.0L 364 5967
Magnaflow
Qty:
712.74
Magnaflow Catalytic Converter  Right
  • Universal Catalytic Converter - 2.50in.
  • CARB Executive Order D-193-136 Engine Family Number 5GMXT06.0194 ; Certification Level : LEV1 LEV OE Spec Cutting and Welding Required During Installation
  • Universal Catalytic Converter - 2.50in.
  • 2.50in. Universal California OBDII Catalytic Converter
  • Product Attributes:
    • Air Tube Adaptable: No
    • Body Height: 4
    • Body Length: 13
    • Body Shape: Round
    • Body Type: Spun
    • Body Width: 4
    • Heat Shield Attached: No
    • Inlet Attachment: Weld-on
    • Inlet Diameter: 2.5
    • Inlet Orientation: Straight
    • Inlet Quantity: 1
    • Outlet Attachment: Weld-on
    • Outlet Diameter: 2.5
    • Outlet Orientation: Straight
    • Outlet Quantity: 1
    • Overall Length: 13
    • Sensor Port Count: 0
    • Series: California
    • Substrate Material: Ceramic
    • Subtitle: California / Carb Compliant
    • Title: California Universal
    • Type: Universal
Brand: Magnaflow
Position: Right
Additional Fitment Information:
Vehicle Position Block Engine CID CC
2005 - Hummer H2 Right V 8 Cyl 6.0L 364 5967
Magnaflow
Qty:
712.74
Magnaflow Catalytic Converter  Left
  • Universal Catalytic Converter - 3.00in.
  • CARB Executive Order D-193-136 Engine Family Number 6GMXT06.0394 ; Certification Level : LEV1 LEV OE Spec Cutting and Welding Required During Installation
  • Universal Catalytic Converter - 3.00in.
  • 3in. Universal California OBDII Catalytic Converter
  • Product Attributes:
    • Air Tube Adaptable: No
    • Body Height: 4
    • Body Length: 12.75
    • Body Shape: Round
    • Body Type: Spun
    • Body Width: 4
    • Heat Shield Attached: No
    • Inlet Attachment: Weld-on
    • Inlet Diameter: 3
    • Inlet Orientation: Straight
    • Inlet Quantity: 1
    • Outlet Attachment: Weld-on
    • Outlet Diameter: 3
    • Outlet Orientation: Straight
    • Outlet Quantity: 1
    • Overall Length: 12.75
    • Sensor Port Count: 0
    • Series: California
    • Substrate Material: Ceramic
    • Subtitle: California / Carb Compliant
    • Title: California Universal
    • Type: Universal
Brand: Magnaflow
Position: Left
Additional Fitment Information:
Vehicle Position Block Engine CID CC
2006 - Hummer H2 Left V 8 Cyl 6.0L 364 5967
Magnaflow
Qty:
712.74
Magnaflow Catalytic Converter  Right
  • Universal Catalytic Converter - 3.00in.
  • CARB Executive Order D-193-136 Engine Family Number 6GMXT06.0394 ; Certification Level : LEV1 LEV OE Spec Cutting and Welding Required During Installation
  • Universal Catalytic Converter - 3.00in.
  • 3in. Universal California OBDII Catalytic Converter
  • Product Attributes:
    • Air Tube Adaptable: No
    • Body Height: 4
    • Body Length: 12.75
    • Body Shape: Round
    • Body Type: Spun
    • Body Width: 4
    • Heat Shield Attached: No
    • Inlet Attachment: Weld-on
    • Inlet Diameter: 3
    • Inlet Orientation: Straight
    • Inlet Quantity: 1
    • Outlet Attachment: Weld-on
    • Outlet Diameter: 3
    • Outlet Orientation: Straight
    • Outlet Quantity: 1
    • Overall Length: 12.75
    • Sensor Port Count: 0
    • Series: California
    • Substrate Material: Ceramic
    • Subtitle: California / Carb Compliant
    • Title: California Universal
    • Type: Universal
Brand: Magnaflow
Position: Right
Additional Fitment Information:
Vehicle Position Block Engine CID CC
2006 - Hummer H2 Right V 8 Cyl 6.0L 364 5967
Bosal
Qty:
193.74
Bosal Catalytic Converter  Right
  • Catalytic Converter
  • ; Cutting and Welding Required During Installation
  • Catalytic Converter
  • BRExhaust Federal Universal Standard Load OBDII Catalytic Converter
  • Product Attributes:
    • Title: Standard Load Universal
Brand: Bosal
Position: Right
Additional Fitment Information:
Vehicle Position Block Engine CID CC
2004 - Hummer H2 Right V 8 Cyl 6.0L 364 5967
Bosal
Qty:
193.74
Bosal Catalytic Converter  Left
  • Catalytic Converter
  • ; Cutting and Welding Required During Installation
  • Catalytic Converter
  • BRExhaust Federal Universal Standard Load OBDII Catalytic Converter
  • Product Attributes:
    • Title: Standard Load Universal
Brand: Bosal
Position: Left
Additional Fitment Information:
Vehicle Position Block Engine CID CC
2004 - Hummer H2 Left V 8 Cyl 6.0L 364 5967
Bosal
Qty:
193.74
Bosal Catalytic Converter  Rear
  • Catalytic Converter
  • ; Cutting and Welding Required During Installation
  • Catalytic Converter
  • BRExhaust Federal Universal Standard Load OBDII Catalytic Converter
  • Product Attributes:
    • Title: Standard Load Universal
Brand: Bosal
Position: Rear
Additional Fitment Information:
Vehicle Position Block Engine CID CC
2006 - Hummer H3 Rear L 5 Cyl 3.5L 211 3460
Eastern Catalytic
Qty:
517.49
Eastern Catalytic Catalytic Converter  Right
  • Federal / EPA Direct-fit Converter Assembly
  • ; Undercar Legal Note: Not For Sale or Use in the State of CA, CO, ME & NY (vehicles with California Emissions)
  • DIRECT FIT
  • Product Attributes:
    • Catalyst Type: Eco Gm
    • Inlet Gasket Qty: 1
    • Inlet Hardware: None
    • Inlet Type A: 3 Bolt Welded
    • O2 Sensor Ports: 2
    • Outlet Gasket Qty: None
    • Outlet Hardware: None
    • Outlet Type A: 2 Bolt Welded
    • Type: Federal / Epa Direct-fit Undercar
  • Latest advanced-manufacturing technology, including automated workstations, spinner welding equipment, and high-speed production lines ensures that all converters are built to exact OE dimensions and fitment. This technology also helps to maintain industry-leading efficiency, productivity, and competitive prices. The proprietary NANO substrate chemistry yields highly efficient loadings for lower cost and better converter efficiency.
Brand: Eastern Catalytic
Position: Right
Additional Fitment Information:
Vehicle Position Block Engine CID CC
2004 - Hummer H2 Right V 8 Cyl 6.0L 364 5967
Eastern Catalytic
Qty:
504.19
Eastern Catalytic Catalytic Converter  Left
  • Federal / EPA Direct-fit Converter Assembly
  • ; Undercar Legal Note: Not For Sale or Use in the State of CA, CO, ME & NY (vehicles with California Emissions)
  • DIRECT FIT
  • Product Attributes:
    • Catalyst Type: Eco Ii
    • Clamp Qty: 2
    • Inlet Gasket Qty: 1
    • Inlet Hardware: None
    • Inlet Type A: 3 Bolt Welded
    • O2 Sensor Ports: 2
    • Outlet Gasket Qty: None
    • Outlet Hardware: None
    • Outlet Type A: 2.5" Od
    • Type: Federal / Epa Direct-fit Undercar
  • Latest advanced-manufacturing technology, including automated workstations, spinner welding equipment, and high-speed production lines ensures that all converters are built to exact OE dimensions and fitment. This technology also helps to maintain industry-leading efficiency, productivity, and competitive prices. The proprietary NANO substrate chemistry yields highly efficient loadings for lower cost and better converter efficiency.
Brand: Eastern Catalytic
Position: Left
Additional Fitment Information:
Vehicle Position Block Engine CID CC
2004 - Hummer H2 Left V 8 Cyl 6.0L 364 5967
Walker
Qty:
165.54
Walker Catalytic Converter  Rear
  • Federal/EPA converters are not legal for sale in the state of California. Restrictions may apply in other states. Consult your state‚Äôs regulation pertaining to aftermarket replacement converters prior to installation; Modifications and/or Additional Parts Required. Fits Fed. & Calif. Emiss. Models.
  • Walker EPA Ultra Universal Converter
  • Product Attributes:
    • Air Tube: No
    • Body Height: 4.250
    • Body Length: 10.000
    • Body Shape: Small Oval
    • Body Width: 6.125
    • California Air Resource Board (CARB) Certified: No
    • Converter Quantity: 1
    • Fitment: Universal
    • Inlet 1 Inside Diameter: 2.500
    • Inlet 1 Type: Pipe Connection
    • Inlet Connection Type: Pipe Connection
    • Inlet Diameter 1: 2.500
    • Inlet Diameter Designation: Inside Diameter
    • Inlet Quantity: 1
    • Longitud del Cuerpo: 10.000
    • Max Year Covered: 2011
    • Maximum Engine Size: 5.9l
    • Maximum Test Weight: 8500
    • Min Year Covered: 1995
    • Most Popular Make / Model: Ford F-150
    • Most Popular Year: 2002
    • Outlet 1 Inside Diameter: 2.500
    • Outlet 1 Type: Pipe Connection
    • Outlet Connection Type: Pipe Connection
    • Outlet Diameter 1: 2.500
    • Outlet Diameter Designation: Inside Diameter
    • Outlet Quantity: 1
    • Overall Length: 13.250
    • Oxygen sensor location: No Port Location
    • Product Grade: Economy
    • Substrate Material: Ceramic
    • Total Part VIO:
      • 10242750
      • 9149999
Brand: Walker
Position: Rear
Additional Fitment Information:
Vehicle Position
2006 - Hummer H3 Rear
Walker
Qty:
165.54
Walker Catalytic Converter  Rear
  • Fits Fed. & Calif. Emission Models Not legal for sale or use in California and other CARB-compliant states. Legal in New York and Maine on EPA Federal Emission Equipped Vehicles only. Consult the aftermarket converter regulations in your state for details. ; Modifications and/or Additional Parts Required
  • Walker EPA Ultra Universal Converter
  • Product Attributes:
    • Air Tube: No
    • Body Height: 4.250
    • Body Length: 10.000
    • Body Shape: Small Oval
    • Body Width: 6.125
    • California Air Resource Board (CARB) Certified: No
    • Converter Quantity: 1
    • Fitment: Universal
    • Inlet 1 Inside Diameter: 2.500
    • Inlet 1 Type: Pipe Connection
    • Inlet Connection Type: Pipe Connection
    • Inlet Diameter 1: 2.500
    • Inlet Diameter Designation: Inside Diameter
    • Inlet Quantity: 1
    • Longitud del Cuerpo: 10.000
    • Max Year Covered: 2011
    • Maximum Engine Size: 5.9l
    • Maximum Test Weight: 8500
    • Min Year Covered: 1995
    • Most Popular Make / Model: Ford F-150
    • Most Popular Year: 2002
    • Outlet 1 Inside Diameter: 2.500
    • Outlet 1 Type: Pipe Connection
    • Outlet Connection Type: Pipe Connection
    • Outlet Diameter 1: 2.500
    • Outlet Diameter Designation: Inside Diameter
    • Outlet Quantity: 1
    • Overall Length: 13.250
    • Oxygen sensor location: No Port Location
    • Product Grade: Economy
    • Substrate Material: Ceramic
    • Total Part VIO:
      • 10242750
      • 9149999
Brand: Walker
Position: Rear
Additional Fitment Information:
Vehicle Position Block Engine CID CC
2006 - Hummer H3 Rear L 5 Cyl 3.5L 211 3460