Hummer H3 Catalytic Converter

Your Hummer H3 will be happy to know that the search for the right Catalytic Converter products you’ve been looking for is over! Advance Auto Parts has 12 different Catalytic Converter for your vehicle, ready for shipping or in-store pick up. The best part is, our Hummer H3 Catalytic Converter products start from as little as $209.99.

When it comes to your Hummer H3, you want parts and products from only trusted brands. Here at Advance Auto Parts, we work with only top reliable Catalytic Converter product and part brands so you can shop with complete confidence. Some of our top Catalytic Converter product brands are Walker and MagnaFlow. We’re sure you will get the right product to keep that H3 running for a long time.

We even have reviews of our OEM and aftermarket Catalytic Converter products to help you buy with confidence. Hear from other customers via the 300 reviews on parts for your Hummer H3.

Shop online, find the best price on the right product, and have it shipped right to your door. If you prefer to shop in person for the right Catalytic Converter products for your H3, visit one of our local Advance Auto Parts locations and you’ll be back on the road in no time!

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Catalytic Converter for a Hummer H3

Use the fitment form at the top of the page to select your exact year and engine type for your Hummer H3.

  • Catalytic Converter- EPA Ultra, Universal/ Fabrication Needed

    Walker - Catalytic Converter- EPA Ultra, Universal/ Fabrication Needed (Part No. 93253)

    Description
    Designed to comply with EPA emissions requirements while delivering premium performance and durability with assured compliance, Walker® Ultra® Universal Catalytic Converters are available for import and domestic OBDII (1996 and newer) vehicles.

    Product Features:
    • EPA COMPLIANT -- For use on OBDII vehicles, 1996 and newer. Not legal for sale or use in CA & CO. Legal in NY & ME on EPA Federal Emission Equipped Vehicles only. Consult your state's aftermarket converter regulations for details.
    • KEEPS CHECK ENGINE LIGHT OFF FOR EMISSIONS CODES -- OE-style high-technology washcoat and optimal precious metal load delivers required reduction in tailpipe emissions to match vehicle application
    • DURABLE -- Features stainless-steel body with aluminized pipe and heat shields for durability
    • FLEXIBLE SOLUTION -- Customizable design features expandable bushings for easy fitment and may require specialized fabrication and/or welding for installation
    • OE-STYLE DESIGN -- Features aluminized heat shields when originally equipped, to match OE design, protecting the undercarriage from heat created by the converter
    4.0
    Read 3 review(s)

    Review snapshot ® by PowerReviews

    4.0
    4.0
    • 5
      5
      2019-12-12
      5
      5

      Yes

      Yes

      Submitted 2019-12-12

      By Muhmmad

      From Undisclosed

      Yes

      Bottom Line NULL

      Yes

      By Muhmmad from Undisclosed

      BOTTOM LINE NULL

    • 5
      5
      2018-12-30
      5
      5

      Inexpensive quality replacement.

      Inexpensive quality replacement.

      Submitted 2018-12-30

      By Michael

      From Undisclosed

      Good product but very little room for error when cutting off old catalytic converter and matching up to new.

      Bottom Line NULL

      Good product but very little room for error when cutting off old catalytic converter and matching up to new.

      By Michael from Undisclosed

      BOTTOM LINE NULL

    • 5
      5
      2018-10-14
      5
      5

      Great Deal!

      Great Deal!

      Submitted 2018-10-14

      By Matthew

      From Undisclosed

      Great product

      Bottom Line NULL

      Great product

      By Matthew from Undisclosed

      BOTTOM LINE NULL

    from $209.99

  • MagnaFlow HM Grade Federal / EPA Compliant Manifold Catalytic Converter - 50664

    MagnaFlow - MagnaFlow HM Grade Federal / EPA Compliant Manifold Catalytic Converter - 50664 (Part No. 50664)

    Description
    Keep the check engine light off with MagnaFlow HM Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 50664. With features including free-flowing mandrel-bent tubing and highly corrosion resistant, stainless steel construction, easily install this spun body converter yourself using the proper tools, no cutting or welding required. MagnaFlow's state-of-the-art metrology department uses the latest 3D scanning systems during research and development, so you can be confident that your new part will fit and function like the original equipment. By replicating the OE spun body design, the single laser fusion weld greatly reduces the possibility of a leak, and our compact, low-mass design also allows for greater thermal efficiency.

    Product Features:
    • Product might not be available in all states due to local laws.
    3.5
    Read 3 review(s)

    Review snapshot ® by PowerReviews

    3.5
    3.5
    • 1
      1
      2019-09-12
      1
      1

      Heats up Quickly

      Heats up Quickly

      Submitted 2019-09-12

      By Sohail

      From Meriden,CT

      Mine lasted only for 8 Months with normal use. It heats up quickly after using for 2-3 minutes And today it just stop working I had to return it.

      Bottom Line not recommended

      Mine lasted only for 8 Months with normal use. It heats up quickly after using for 2-3 minutes And today it just stop working I had to return it.

      By Sohail from Meriden,CT

      BOTTOM LINE not recommended

    • 5
      5
      2019-05-29
      5
      5

      Accurate and good value.

      Accurate and good value.

      Submitted 2019-05-29

      By Harold

      From Undisclosed

      It worked perfectly. Inflation of the 4 auto tires to spec values was fast and the gauge checked within two psi of my uncalibrated gauge. And the price was very reasonable.

      Bottom Line NULL

      It worked perfectly. Inflation of the 4 auto tires to spec values was fast and the gauge checked within two psi of my uncalibrated gauge. And the price was very reasonable.

      By Harold from Undisclosed

      BOTTOM LINE NULL

    • 5
      5
      2019-05-02
      5
      5

      I have purchased four in the past few years.

      I have purchased four in the past few years.

      Submitted 2019-05-02

      By Gary

      From Davie, Fl Near Orange Fr. store

      I have a small car, this is pump is so small it fits in the glove box.I usually use it ti top off low tires instead putting five quarters into a broken gas station air compressor. I have used it to take a repaired flat tire to full 32 PSI. I did give it a rest. I wouldn't buy this if I owned a huge rig but it pays to have that security in my tiny glove box. I bought one each for my kids and a friend. Everything is short but compact. A VERY convenient light is on the hose side to make it easier to attach the hose. I just wish it lit the gauge too. The hose is the screw on type. Very nice.

      Bottom Line recommended

      I have a small car, this is pump is so small it fits in the glove box.I usually use it ti top off low tires instead putting five quarters into a broken gas station air compressor. I have used it to take a repaired flat tire to full 32 PSI. I did give it a rest. I wouldn't buy this if I owned a huge rig but it pays to have that security in my tiny glove box. I bought one each for my kids and a friend. Everything is short but compact. A VERY convenient light is on the hose side to make it easier to attach the hose. I just wish it lit the gauge too. The hose is the screw on type. Very nice.

      By Gary from Davie, Fl Near Orange Fr. store

      BOTTOM LINE recommended

    from $1229.99

  • Catalytic Converter- EPA Ultra, Universal/ Fabrication Needed

    Walker - Catalytic Converter- EPA Ultra, Universal/ Fabrication Needed (Part No. 93238)

    Description
    Designed to comply with EPA emissions requirements while delivering premium performance and durability with assured compliance, Walker® Ultra® Universal Catalytic Converters are available for import and domestic OBDII (1996 and newer) vehicles.

    Product Features:
    • EPA COMPLIANT -- For use on OBDII vehicles, 1996 and newer. Not legal for sale or use in CA & CO. Legal in NY & ME on EPA Federal Emission Equipped Vehicles only. Consult your state's aftermarket converter regulations for details.
    • KEEPS CHECK ENGINE LIGHT OFF FOR EMISSIONS CODES -- OE-style high-technology washcoat and optimal precious metal load delivers required reduction in tailpipe emissions to match vehicle application
    • DURABLE -- Features stainless-steel body with aluminized pipe and heat shields for durability
    • FLEXIBLE SOLUTION -- Customizable design features expandable bushings for easy fitment and may require specialized fabrication and/or welding for installation
    • OE-STYLE DESIGN -- Features aluminized heat shields when originally equipped, to match OE design, protecting the undercarriage from heat created by the converter
    3.0
    Read 2 review(s)

    Review snapshot ® by PowerReviews

    3.0
    3.0
    • 5
      5
      2018-09-09
      5
      5

      Read the description

      Read the description

      Submitted 2018-09-09

      By BillTheWelder

      From Virginia Beach VA

      This is a good aftermarket cat that you will have to modify to fit your vehicle. This a universal cat that is determined to be an exact fit based on the engine you have in your vehicle and it's displacement. Exhaust flow rates will be different from a 4 to a 10 cylinder which means that all parts of an exhaust system have to be sized to meet a minimum flow rate to allow the exhaust gases to pass through without causing restrictions and hurting power and gas mileage.

      Bottom Line recommended

      This is a good aftermarket cat that you will have to modify to fit your vehicle. This a universal cat that is determined to be an exact fit based on the engine you have in your vehicle and it's displacement. Exhaust flow rates will be different from a 4 to a 10 cylinder which means that all parts of an exhaust system have to be sized to meet a minimum flow rate to allow the exhaust gases to pass through without causing restrictions and hurting power and gas mileage.

      By BillTheWelder from Virginia Beach VA

      BOTTOM LINE recommended

    • 1
      1
      2015-04-18
      1
      1

      exact fit??????

      exact fit??????

      Submitted 2015-04-18

      By upset

      From Manassas Va.

      This is NOT an exact fit. It is 2.5 inches shorter than what is on the truck!

      Bottom Line not recommended

      This is NOT an exact fit. It is 2.5 inches shorter than what is on the truck!

      By upset from Manassas Va.

      BOTTOM LINE not recommended

    from $263.99

  • MagnaFlow OEM Grade Federal / EPA Compliant Manifold Catalytic Converter - 49353

    MagnaFlow - MagnaFlow OEM Grade Federal / EPA Compliant Manifold Catalytic Converter - 49353 (Part No. 49353)

    Description
    Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 49353. With features including free-flowing mandrel-bent tubing and highly corrosion resistant, stainless steel construction, easily install this spun body converter yourself using the proper tools, no cutting or welding required. MagnaFlow's state-of-the-art metrology department uses the latest 3D scanning systems during research and development, so you can be confident that your new part will fit and function like the original equipment. By replicating the OE spun body design, the single laser fusion weld greatly reduces the possibility of a leak, and our compact, low-mass design also allows for greater thermal efficiency.

    Product Features:
    • Product might not be available in all states due to local laws.

    from $1455.99

  • MagnaFlow OEM Grade Federal / EPA Compliant Universal Catalytic Converter - 2.50in. - 51206

    MagnaFlow - MagnaFlow OEM Grade Federal / EPA Compliant Universal Catalytic Converter - 2.50in. - 51206 (Part No. 51206)

    Description
    MagnaFlow OEM Grade Federal/EPA Compliant Universal Catalytic Converter 51206 helps keep the check engine light off. Get the right fit for a wide array of vehicles thanks to the adaptable Universal design (cutting and welding is required). With highly corrosion resistant, stainless steel construction, you can have confidence in the quality of this catalytic converter.

    Product Features:
    • Product might not be available in all states due to local laws.

    from $241.99

  • Catalytic Converter- EPA Ultra, Direct Replacement, No Fabrication Needed

    Walker - Catalytic Converter- EPA Ultra, Direct Replacement, No Fabrication Needed (Part No. 54480)

    Description
    Designed to comply with EPA standards while delivering premium performance with assured compliance, Walker® Ultra® Direct-Fit Catalytic Converters provide premium performance and are available for import and domestic OBDII (1996 and newer) vehicles.

    Product Features:
    • EPA COMPLIANT -- For use on OBDII vehicles, 1996 and newer. Not legal for sale or use in CA & CO. Legal in NY & ME on EPA Federal Emission Equipped Vehicles only. Consult your state's aftermarket converter regulations for details.
    • DIRECT-FIT DESIGN -- Direct-fit bolt-on replacement solution with OE-style hangers, brackets, routings and heat shields for easy installation that doesn't require specialized fabrication and/or welding
    • KEEPS CHECK ENGINE LIGHT OFF FOR EMISSIONS CODES -- OE-style high-technology washcoat and optimal precious metal load delivers required reduction in tailpipe emissions to match vehicle application
    • STRONG AND DURABLE -- Features thick OE-style flanges, hangers and brackets for strength and durability
    • OE-STYLE DESIGN -- Features aluminized heat shields when originally equipped, to match OE design, protecting the undercarriage from heat created by the converter

    from $511.99

  • MagnaFlow HM Grade Federal / EPA Compliant Universal Catalytic Converter - 2.50in. - 99206HM

    MagnaFlow - MagnaFlow HM Grade Federal / EPA Compliant Universal Catalytic Converter - 2.50in. - 99206HM (Part No. 99206HM)

    Description
    MagnaFlow HM Grade Federal/EPA Compliant Universal Catalytic Converter 99206HM helps keep the check engine light off. Get the right fit for a wide array of vehicles thanks to the adaptable Universal design (cutting and welding is required). With highly corrosion resistant, stainless steel construction, you can have confidence in the quality of this catalytic converter.

    Product Features:
    • Product might not be available in all states due to local laws.

    from $221.99

  • MagnaFlow HM Grade Federal / EPA Compliant Direct-Fit Catalytic Converter - 23966

    MagnaFlow - MagnaFlow HM Grade Federal / EPA Compliant Direct-Fit Catalytic Converter - 23966 (Part No. 23966)

    Description
    MagnaFlow HM Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 23966 helps keep the check engine light off. DIY installation is easy with the proper tools (no cutting or welding required). With features including mandrel-bent tubing to eliminate flow restrictions and stainless steel construction to resist corrosion, you can have confidence in the quality of this catalytic converter. Using state-of-the-art 3D scanning systems in the design process, the MagnaFlow metrology department ensures this new part to fit and function like the original equipment.

    Product Features:
    • Product might not be available in all states due to local laws.

    from $566.99

  • EPA Ultra Manifold Converter, Direct Replacement, No Fabrication Needed

    Walker - EPA Ultra Manifold Converter, Direct Replacement, No Fabrication Needed (Part No. 16578)

    Description
    Designed to comply with EPA emissions requirements while delivering premium performance with assured compliance, Walker® Ultra® EPA-Compliant Manifold Converters are available for import and domestic OBDII (1996 and newer) vehicles.

    Product Features:
    • EPA COMPLIANT -- For use on OBDII vehicles, 1996 and newer. Not legal for sale or use in CA & CO. Legal in NY & ME on EPA Federal Emission Equipped Vehicles only. Consult your state's aftermarket converter regulations for details.
    • DIRECT-FIT DESIGN -- Bolt-off, bolt-on OE-style converter with integrated manifold assemblies that attach directly to engine cylinder head and match all downstream connections
    • KEEPS CHECK ENGINE LIGHT OFF FOR EMISSIONS CODES -- OE-style high-technology washcoat and optimal precious metal load delivers required reduction in tailpipe emissions to match vehicle application
    • STRONG AND DURABLE -- Features thick OE-style flanges and manifolds for strength and durability
    • OE-STYLE DESIGN -- Features aluminized heat shields when originally equipped, to match OE design, protecting the undercarriage from heat created by the converter

    from $1178.99

  • EPA Ultra Manifold Converter, Direct Replacement, No Fabrication Needed

    Walker - EPA Ultra Manifold Converter, Direct Replacement, No Fabrication Needed (Part No. 16481)

    Description
    Designed to comply with EPA emissions requirements while delivering premium performance with assured compliance, Walker® Ultra® EPA-Compliant Manifold Converters are available for import and domestic OBDII (1996 and newer) vehicles.

    Product Features:
    • EPA COMPLIANT -- For use on OBDII vehicles, 1996 and newer. Not legal for sale or use in CA & CO. Legal in NY & ME on EPA Federal Emission Equipped Vehicles only. Consult your state's aftermarket converter regulations for details.
    • DIRECT-FIT DESIGN -- Bolt-off, bolt-on OE-style converter with integrated manifold assemblies that attach directly to engine cylinder head and match all downstream connections
    • KEEPS CHECK ENGINE LIGHT OFF FOR EMISSIONS CODES -- OE-style high-technology washcoat and optimal precious metal load delivers required reduction in tailpipe emissions to match vehicle application
    • STRONG AND DURABLE -- Features thick OE-style flanges and manifolds for strength and durability
    • OE-STYLE DESIGN -- Features aluminized heat shields when originally equipped, to match OE design, protecting the undercarriage from heat created by the converter

    from $1174.99

  • MagnaFlow OEM Grade Federal / EPA Compliant Manifold Catalytic Converter - 51085

    MagnaFlow - MagnaFlow OEM Grade Federal / EPA Compliant Manifold Catalytic Converter - 51085 (Part No. 51085)

    Description
    Keep the check engine light off with MagnaFlow OEM Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 51085. With features including free-flowing mandrel-bent tubing and highly corrosion resistant, stainless steel construction, easily install this spun body converter yourself using the proper tools, no cutting or welding required. MagnaFlow's state-of-the-art metrology department uses the latest 3D scanning systems during research and development, so you can be confident that your new part will fit and function like the original equipment. By replicating the OE spun body design, the single laser fusion weld greatly reduces the possibility of a leak, and our compact, low-mass design also allows for greater thermal efficiency.

    Product Features:
    • Product might not be available in all states due to local laws.

    from $998.99

  • MagnaFlow OEM Grade Federal / EPA Compliant Direct-Fit Catalytic Converter - 49612

    MagnaFlow - MagnaFlow OEM Grade Federal / EPA Compliant Direct-Fit Catalytic Converter - 49612 (Part No. 49612)

    Description
    MagnaFlow OEM Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 49612 helps keep the check engine light off. DIY installation is easy with the proper tools (no cutting or welding required). With features including mandrel-bent tubing to eliminate flow restrictions and stainless steel construction to resist corrosion, you can have confidence in the quality of this catalytic converter. Using state-of-the-art 3D scanning systems in the design process, the MagnaFlow metrology department ensures this new part to fit and function like the original equipment.

    Product Features:
    • Product might not be available in all states due to local laws.

    from $670.99

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