1991 Buick Riviera Catalytic Converter

Your 1991 Buick Riviera might be the best vehicle you’ve ever owned. Or you may just be struggling to keep it highway-approved. No matter the situation, Advance Auto Parts has the Catalytic Converter product you desperately need.

We currently carry 5 Catalytic Converter products to choose from for your 1991 Buick Riviera, and our inventory prices range from as little as $156.99 up to $467.99.

On top of low prices, Advance Auto Parts offers 2 different trusted brands of Catalytic Converter products for the 1991 Buick Riviera. We only sell parts from trusted brands like Walker so that you can find quality parts you can count on.

Don’t take our word for it - check out customer ratings and reviews to buy with confidence. We have 6 reviews on our Catalytic Converter products for the 1991 Buick Riviera from previous customers.

Have parts delivered straight to your home, or find the nearest Advance Auto Parts store to check out our Catalytic Converter stock in-person!

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Catalytic Converter for Your 1991 Buick Riviera

Search through our amazing selection of Catalytic Converter products for your 1991 Buick Riviera to find exactly what you’re looking for. Compare prices and reviews to choose the best part for you.

  • Catalytic Converter- EPA Standard, Universal/ Fabrication Needed

    Walker - Catalytic Converter- EPA Standard, Universal/ Fabrication Needed (Part No. 15042)

    Description
    Designed to provide the required reduction in tailpipe emissions and meet EPA emissions requirements with assured compliance, Walker® Universal Catalytic Converters are available for pre-OBDII (1995 and older) vehicles.

    Product Features:
    • EPA COMPLIANT -- For use on pre-OBDII vehicles, 1995 and older. Not legal for sale or use in CA. Legal in NY and ME on all pre-OBD vehicles only. Consult your state's aftermarket converter regulations for details.
    • NO BREAK IN REQUIRED -- Ready to operate with application-specific converter shell design and mat compression, no converter break in required after installation
    • 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
    4.5
    Read 3 review(s)

    Review snapshot ® by PowerReviews

    4.5
    4.5
    • 5
      5
      2020-05-04
      5
      5

      Product fitted application.

      Product fitted application.

      Submitted 2020-05-04

      By Charles

      From Undisclosed

      Replaced stock converter and would use again.

      Bottom Line NULL

      Replaced stock converter and would use again.

      By Charles from Undisclosed

      BOTTOM LINE NULL

    • 5
      5
      2017-05-27
      5
      5

      Yes

      Yes

      Submitted 2017-05-27

      By jim

      From undisclosed

      It tooka few adapters but all welded seams .all 👍

      Bottom Line NULL

      It tooka few adapters but all welded seams .all 👍

      By jim from undisclosed

      BOTTOM LINE NULL

    • 5
      5
      2013-03-30
      5
      5

      I would buy this product again

      I would buy this product again

      Submitted 2013-03-30

      By Jim

      From Breinigsville, PA

      Quality Product!!

      Bottom Line recommended

      Quality Product!!

      By Jim from Breinigsville, PA

      BOTTOM LINE recommended

    from $199.99

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

    Walker - Catalytic Converter- EPA Standard, Direct Replacement, No Fabrication Needed (Part No. 15642)

    Description
    Designed to provide the required reduction in tailpipe emissions and meet EPA emissions requirements with assured compliance, Walker® Standard® direct-fit catalytic converters are available for pre-OBD (1995 and older) vehicles.

    Product Features:
    • EPA COMPLIANT -- For use on pre-OBD vehicles, 1995 and older. Not legal for sale or use in CA. Legal in NY and ME on all pre-OBD 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
    • 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
    3.0
    Read 1 review(s)

    Review snapshot ® by PowerReviews

    3.0
    3.0
    • 3
      3
      2011-09-20
      3
      3

      Direct-Fit????

      Direct-Fit????

      Submitted 2011-09-20

      By Dave the Old Fart

      From Henrico, Va.

      My mechanic, a friend on mine, said this product was good, but required a little more time than the "Direct-Fit" implies. He said it still required welding to the old hanger.

      Bottom Line recommended

      My mechanic, a friend on mine, said this product was good, but required a little more time than the "Direct-Fit" implies. He said it still required welding to the old hanger.

      By Dave the Old Fart from Henrico, Va.

      BOTTOM LINE recommended

    from $309.99

  • Universal Catalytic Converter : Fabrication Needed; 2.5 " Inlet /, 2.5 " Outlet, EPA Compliance

    MagnaFlow - Universal Catalytic Converter : Fabrication Needed; 2.5 " Inlet /, 2.5 " Outlet, EPA Compliance (Part No. 94016)

    Description
    MagnaFlow Standard Grade Federal/EPA Compliant Universal Catalytic Converter 94016 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. This replacement part is designed to meet or exceed Federal emissions requirements set forth by the EPA, complying with legal standards for pre-OBDII Federally registered vehicles.

    from $156.99

  • CalCat Catalytic Converter- CARB Certified, Universal / Fabrication Needed

    Walker - CalCat Catalytic Converter- CARB Certified, Universal / Fabrication Needed (Part No. 81128)

    Description
    Designed, tested and validated for assured compliance to meet CARB standards, Walker® CalCat® Universal Catalytic Converters are available for OBDII (1996 and newer) and non-OBD (1995 and older) vehicles.

    Product Features:
    • CARB COMPLIANT -- For use on OBDII vehicles, 1996 and newer and non-OBD 1995 and older. Legal for sale in CA, CO & other states requiring CARB-compliant replacement converters. Consult your state's aftermarket converter regulations.
    • SUPERIOR TECHNOLOGY -- Optimal high technology washcoat formulated to deliver superior performance (as compared to EPA-compliant converters)
    • CONSISTENT PERFORMANCE -- Utilizes a precise OE-style coating process to apply catalyst material to the substrate, providing consistent performance for assured emissions compliance
    • 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

    from $467.99

  • Direct Fit Catalytic Converter: No Fabrication Needed, EPA Compliance

    MagnaFlow - Direct Fit Catalytic Converter: No Fabrication Needed, EPA Compliance (Part No. 23223)

    Description
    MagnaFlow Standard Grade Federal/EPA Compliant Direct-Fit Catalytic Converter 23223 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. This direct-fit catalytic converter is designed to fit the 1986-1993 Cadillac DeVille, 1992-1994 Buick LeSabre, and additional vehicles. This replacement part is designed to meet or exceed Federal emissions requirements set forth by the EPA, complying with legal standards for pre-OBDII Federally registered vehicles.

    from $292.99

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