Catalytic Converters

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    • (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...
      Constructed to meet your vehicle’s specific emissions requirementsDirect fit design
      $219.87 - $573.01
    • (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...
      Ensures an even distribution of the gas flow in the converter to deliver optimized conversion of harmful gasesConcepts-enhance the reduction of emissions and ensure a high durability
      $71.69 - $462.59
    • (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...
      Direct OEM replacementConverts harmful engine emissions to less dangerous gases and water vapor
      $37.21 - $555.79
    • (0 reviews)
      # mpn4564000788
      Catalytic Converter by AP Exhaust®. Converter Configuration: Direct Fit. 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...
      5-year/50,000-mile warranty on converter body25,000-mile warranty on emissions
      $262.87
    • (0 reviews)
      # mpn4563998732
      Catalytic Converter by AP Exhaust®. Converter Configuration: Direct Fit. 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...
      5-year/50,000-mile warranty on converter body25,000-mile warranty on emissions
      $252.15
    • (7 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...
      5-year/50,000-mile warranty on converter body25,000-mile warranty on emissions
      $38.19 - $590.10
    • (15 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...
      Helps your vehicle emit harmless gasesDirect OEM replacement
      $30.32 - $1,275.70
    • (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...
      Direct fitMade from a heavy duty stainless steel outer shell
      $142.59 - $859.95
    • (10 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...
      Direct-Fit Catalytic Converters are a direct replacement for original equipmentManufactured using mandrel-bent 16-gauge and stainless steel tubing
      $60.83 - $706.74
    • (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...
      Direct OEM replacementConverts harmful engine emissions to less dangerous gases and water vapor
      $223.81 - $739.33
    • (2 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...
      Helps your vehicle emit harmless gasesDirect OEM replacement
      $148.16 - $649.46
    • (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...
      Converts harmful engine emissions to less dangerous gases and water vaporAdvanced design for maximum engine output
      $34.43 - $252.91
    • (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...
      Designed to restore your vehicle’s exhaust systemGenuine OE replacement parts from the OE manufacturer
      $210.65 - $1,473.78
    • (0 reviews)
      # sp99526
      Direct Fit Diesel Particulate Filter by AP Exhaust®. Today’s exhaust performance market continues to cover a broad spectrum of vehicles. The unique nature of this market is that a product demand is not based on vehicle age or use but...
      $1,151.23 - $1,895.39
    • (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...
      Flange to flange, direct fit design bolts to existing exhaust5 Year / 50,000 Miles Warranty on Structural Components
      $246.07
    • (6 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...
      Constructed to meet your vehicle’s specific emissions requirementsBody and pipe heat shields made of high quality materials for durability
      $138.60 - $888.18
    • (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...
      Constructed to meet your vehicle’s specific emissions requirementsBody and pipe heat shields made of high quality materials for durability
      $128.00 - $527.36
    • (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...
      Designed to meet your vehicle’s specific emissions requirementsDirect fit replacement
      $209.62
    • (0 reviews)
      # sp128215
      EX Ultra™ 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....
      Constructed to meet your vehicle’s specific emissions requirementsBody and pipe heat shields made of high quality materials for durability
      $282.85 - $628.49
    • (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...
      Constructed to meet your vehicle’s specific emissions requirementsBody and pipe heat shields made of high quality materials for durability
      $264.69 - $349.36
    • (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...
      5 Year / 50,000 Miles Warranty on Structural Components5 Year / 50,000 Miles Warranty on Exhaust Emission (CARB Models)
      $79.31 - $558.84
    • (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...
      EPA & CARB Emissions Products Available for Most Vehicles5 Year / 50,000 Miles Warranty on Structural Components
      $56.30 - $137.12
    • (6 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...
      EPA & CARB Emissions Products Available for Most VehiclesEmission, Structural Warranty: 5 Years / 50,000 Miles (80,000 Kilometers)
      $61.08 - $288.61
    • (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...
      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
      $181.97 - $738.55
    • (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...
      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
      $307.34 - $405.51
    • (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...
      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
      $303.05
    • (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
      $81.52 - $865.27
    • (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
      $282.40 - $282.44
    • (0 reviews)
      # sp157608
      Universal Fit 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 techniques to...
      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
      $51.17 - $123.17
    • (0 reviews)
      # sp159995
      Universal Fit Catalytic Converter (P) 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
      $51.17 - $208.43




    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.

    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.

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    Replacement Catalytic Converters Reviews

    Average rating:    4.5 - 285 reviews
    5 of 5
    Walker
    Bolted right up. Thanks got it fast!
    Posted by Robert (Clyde, OH) / November 3, 20182006 Chevy Cobalt
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