Catalytic Converters

The catalytic converter is part of your vehicle's exhaust system, but more importantly, it's also a key component of the emissions system. The catalytic converter takes the Carbon Monoxide (CO), Hydrocarbons (HC), and Oxides of Nitrogen (NOx) created during combustion, and turns them into water, Carbon Dioxide (CO2) and Nitrogen (N2). The device is so named because it contains catalysts, substances that cause a chemical reaction without themselves undergoing chemical change.

Show items:
Sort by:
    • (0 reviews)
      # sp106310
      CalCat™ Manifold with Integrated Catalytic Converter Converter by Walker®. Walker offers complete coverage: direct-fit mufflers, converters, pipes, resonators and accessories. Walker is an OE supplier to many major nameplate vehicle...
      $209.61 - $566.90
    • (7 reviews)
      # sp4602
      Catalytic Converter by Bosal®. Bosal has a comprehensive range of more than 1,000 petrol and diesel catalytic converters, including the latest Euro 4 type-approved units. Manufactured in TUV-certified plants using the latest high-spec...
      $58.27 - $449.37
    • (6 reviews)
      # sp4294
      Direct Fit Catalytic Converter by Eastern®. If you need to replace your failed or damaged catalytic converter, this product is the right choice. Designed specifically for your vehicle, this catalytic converter is a great alternative to...
      $36.15 - $539.91
    • (6 reviews)
      # sp93964
      Direct Fit Catalytic Converter by AP Exhaust®. The growing concern for the environment means there is a growing need for quality emission control products. AP catalysts and catalytic convert systems can be found in a vast array of...
      $56.49 - $629.79
    • (11 reviews)
      # sp13664
      Direct Fit Catalytic Converter by Davico®. This direct-fit catalytic converter by Davico will be a great solution to replace your failed or damaged catalytic converter. Once your stock cat fails to perform its job, replacement is the...
      $29.46 - $1,239.25
    • (5 reviews)
      # sp92788
      Direct Fit Catalytic Converter by DEC®. Pick out a catalytic converter by DEC and get your emissions back into check without worrying to fail again. These catalytic converters are made from a heavy duty stainless steel outer shell which...
      $138.52 - $835.38
    • (4 reviews)
      # sp110016
      Direct Fit Catalytic Converter with Integrated Manifold by PaceSetter®. PaceSetter Manifold Catalytic Converters are custom-engineered to deliver maximum performance and efficiency from your engine with durability and ease of...
      $133.54 - $615.06
    • (0 reviews)
      # sp106550
      ECO CARB Exhaust Manifold with Integrated Catalytic Converter by Eastern®. If you need to replace your failed or damaged manifold, this product is the right choice. Designed specifically for your vehicle, this manifold with integrated...
      $217.41 - $718.20
    • (0 reviews)
      # sp107600
      Exhaust Manifold with Integrated Catalytic Converter by Davico®. This product by Davico will be a great solution to replace your failed or damaged catalytic converter. Once your stock cat fails to perform its job, replacement is the...
      $143.46 - $630.90
    • (0 reviews)
      # sp4295
      Universal Fit Catalytic Converter by Eastern®. Whether your catalytic converter is damaged by road debris or failed due to an engine problem, you definitely need a new one, and this product is the way to go. Made of stainless steel, the...
      $33.45 - $245.69
    • (0 reviews)
      # sp107734
      Catalytic Converter by Genuine®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind. It will meet your needs and deliver great quality at...
      $190.78 - $1,503.26
    • (2 reviews)
      # sp18944
      Direct Fit Catalytic Converter by PaceSetter®. CARB Compliant: No. Converter Configuration: Direct Fit. Catalytic Converter Format: Main Catalytic Converter. Stainless Steel. Custom Engineered to deliver maximum performance and...
      $85.57 - $474.75
    • (0 reviews)
      # sp4302
      Exhaust Manifold with Integrated Catalytic Converter by Walker®. Walker offers complete coverage: direct-fit mufflers, converters, pipes, resonators and accessories. Walker is an OE supplier to many major nameplate vehicle...
      $246.30
    • (5 reviews)
      # sp128212
      CalCat Catalytic Converter and Pipe Assembly by Walker®. Walker offers complete coverage: direct-fit mufflers, converters, pipes, resonators and accessories. Walker is an OE supplier to many major nameplate vehicle manufacturers. Trust...
      $152.66 - $855.80
    • (0 reviews)
      # sp128213
      CalCat Direct Fit Catalytic Converter (California Legal) by Walker®. Walker offers complete coverage: direct-fit mufflers, converters, pipes, resonators and accessories. Walker is an OE supplier to many major nameplate vehicle...
      $122.02 - $574.16
    • (5 reviews)
      # sp132534
      Direct Fit Catalytic Converters by Walker®. This catalytic converter is constructed specially for your vehicle to directly replace the original equipment part and comes ready to install. The part is designed to meet EPA Emissions...
      $207.91
    • (0 reviews)
      # sp128215
      EX Ultra™ Catalytic Converter and Pipe Assembly (Shipping Restrictions) by Walker®. Walker offers complete coverage: direct-fit mufflers, converters, pipes, resonators and accessories. Walker is an OE supplier to many major nameplate...
      $283.05 - $629.06
    • (0 reviews)
      # sp109219
      EX Ultra™ Direct Fit Round Body Catalytic Converter by Walker®. Walker offers complete coverage: direct-fit mufflers, converters, pipes, resonators and accessories. Walker is an OE supplier to many major nameplate vehicle...
      $263.67 - $352.74
    • (13 reviews)
      # sp10058
      Ultra™ Direct-Fit Catalytic Converter by Walker®. Walker offers complete coverage: direct-fit mufflers, converters, pipes, resonators and accessories. Walker is an OE supplier to many major nameplate vehicle manufacturers. Trust...
      $76.47 - $561.78
    • (1 review)
      # sp10059
      Ultra™ Universal Fit Catalytic Converter by Walker®. Walker offers complete coverage: direct-fit mufflers, converters, pipes, resonators and accessories. Walker is an OE supplier to many major nameplate vehicle manufacturers. Trust...
      $53.64 - $120.19
    • (5 reviews)
      # sp4304
      Universal Fit Catalytic Converter by Walker®. Walker offers complete coverage: direct-fit mufflers, converters, pipes, resonators and accessories. Walker is an OE supplier to many major nameplate vehicle manufacturers. Trust Walker, an...
      $60.48 - $259.91
    • (2 reviews)
      # sp20037
      Manifold with Integrated Catalytic Converter by Bosal®. If you’re in need of a replacement catalytic converter, you can’t do better than Bosal. They’re a leading supplier to vehicle manufacturers and use advanced manufacturing...
      $176.77 - $542.45
    • (0 reviews)
      # sp106606
      Premium Load Exhaust Manifold with Integrated Catalytic Converter by Bosal®. If you’re in need of a replacement catalytic converter, you can’t do better than Bosal. They’re a leading supplier to vehicle manufacturers and use...
      $298.55 - $393.92
    • (0 reviews)
      # sp106607
      Standard Load Exhaust Manifold with Integrated Catalytic Converter by Bosal®. If you’re in need of a replacement catalytic converter, you can’t do better than Bosal. They’re a leading supplier to vehicle manufacturers and use...
      $294.39
    • (6 reviews)
      # sp128225
      Catalytic Converter and Pipe Assembly by Bosal®. If you’re in need of a replacement catalytic converter, you can’t do better than Bosal. They’re a leading supplier to vehicle manufacturers and use advanced manufacturing techniques...
      Constructed to meet your vehicle’s specific emissions requirementsRadial flow concept allows for an even distribution of the gas flow in the converter for the optimal conversion of harmful gases
      $79.19 - $840.55
    • (0 reviews)
      # sp128230
      HM Grade Catalytic Converter and Pipe Assembly by Bosal®. If you’re in need of a replacement catalytic converter, you can’t do better than Bosal. They’re a leading supplier to vehicle manufacturers and use advanced manufacturing...
      Constructed to meet your vehicle’s specific emissions requirementsRadial flow concept allows for an even distribution of the gas flow in the converter for the optimal conversion of harmful gases
      $273.64 - $277.50
    • (0 reviews)
      # sp106556
      ECO GM Exhaust Manifold by Eastern®. If you need to replace your failed or damaged manifold, this product is the right choice. Designed specifically for your vehicle, this manifold with integrated catalytic converter is a great...
      $145.73 - $384.33
    • (0 reviews)
      # sp106557
      ECO II Stainless Steel Exhaust Manifold with Integrated Catalytic Converter by Eastern®. If you need to replace your failed or damaged manifold, this product is the right choice. Designed specifically for your vehicle, this manifold...
      $166.49 - $613.59
    • (2 reviews)
      # sp106558
      ECO III Exhaust Manifold by Eastern®. If you need to replace your failed or damaged manifold, this product is the right choice. Designed specifically for your vehicle, this manifold with integrated catalytic converter is a great...
      $159.26 - $607.69
    • (2 reviews)
      # sp21032
      Manifold with Integrated Catalytic Converter by Eastern®. If you need to replace your failed or damaged manifold, this product is the right choice. Designed specifically for your vehicle, this manifold with integrated catalytic...
      $206.94 - $464.85




    Featured Brands

    Catalytic converters have been original equipment on most gasoline engine vehicles in the U.S. since 1975. They have evolved since their inception, from 2-way converters to 3-way converters plus air, to the modern 3-way converter. Early 2-way converters, also called oxidation catalytic converters, were so called because they only converted HC and CO. In the late 1970s and early 1980s they were replaced on most vehicles by 3-way converters, which can also control NOx emissions. 3-way converters are known as oxidation-reduction catalytic converters.

    In general a converter is composed of a cylindrical stainless steel enclosure housing a monolithic substrate which contains the catalyst. The most common catalyst materials are the precious metals platinum, palladium, and rhodium. The substrate is constructed to expose as much exhaust gas as possible to the catalyst as it flows through the converter, for maximum conversion and efficiency. 2-way converters use platinum and palladium to oxidize CO and HC. 3-way converters also have rhodium to reduce NOx. Early 3-way converters had a separate substrate that oxidized CO and HC with help from additional oxygen supplied by an air pump. Modern 3-way converters use advanced chemistry, O2 monitoring and computerized fuel control to convert all 3 harmful gases without the need for additional oxygen.

    Various factors can cause converter failure. Internal problems like plugging or reduced conversion efficiency are nearly always caused by engine problems like misfire, rich air/fuel mixture, coolant leaks, and oil burning. Misfires and excessive fuel can cause the converter to overheat and melt the substrate, while oil and antifreeze can coat the surface of the substrate, preventing catalyst exposure to the exhaust. In its location under the vehicle, the converter is also exposed to impact from road debris that could cause structural damage. A clogged converter will restrict exhaust flow resulting in poor performance. Other symptoms of a failed converter include rattling noises, an illuminated Check Engine light, and excessive emissions, which can result in a failed smog test.

    Regardless of the cause for catalytic converter malfunction and symptoms, we can supply you with a replacement that will restore performance and make your vehicle emissions legal. We offer both direct fit and universal converters that are EPA (Environmental Protection Agency) and CARB (California Air Resources Board) compliant. A direct fit converter will fit and function the same as your factory converter, and bolt right in place in your exhaust system, while a universal converter will require pipe cutting and clamping or welding for attachment. We also offer converters for applications where the converter is part of the exhaust manifold. Many of our manifolds with integrated converters come as complete kits with all gaskets, hardware, and shields (as required) included.

    Related Categories

    Guides & Articles

    Useful articles fast to read and guides easy to understand written by mechanics and car enthusiasts to turn your shopping experience with CARiD into a pleasure

    • Replacement Exhaust Parts
      August 10, 2016
      Exhaust Clamps, Gaskets & Hangers | Don’t...
      Exhaust system gaskets, clamps, and hanger pieces are probably some of the most overlooked parts on your entire vehicle. Since you don't see them, clean them, or...
      by Michael Grayen
    • Performance Exhaust Systems
      May 19, 2016
      Why Do Some Replacement Exhaust Manifolds Come...
      If you're looking for a replacement exhaust manifold, you may notice that the choices available for your specific vehicle are only available with an "integrated"...
      by Michael Grayen

    Browse by Vehicle

    Replacement Catalytic Converters Reviews

    Average rating:  4.5  4.5 - 272 reviews
    5 of 5
    Buy This Cat
    Good looking quality product! Much better than the original on my Corvette!
    Posted by Douglas C. Watson Sr. (Coos Bay, OR) / July 11, 20181990 Chevy Corvette
    Was this review helpful for you? Yes
    View More


    Low Prices Price match guarantee
    In-House Experts We know our products
    Guaranteed Fitment Always the correct part
    Easy Returns Quick & Hassle Free

    All manufacturer names, symbols, and descriptions, used in our images and text are used solely for identification purposes only. It is neither inferred nor implied that any item sold by CARiD.com is a product authorized by or in any way connected with any vehicle manufacturers displayed on this page.

    SECURE SHOPPING