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.

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    • (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
      $227.71 - $492.19
    • (0 reviews)
      # sp26992
      Ultra™ 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...
      5 Year / 50,000 Miles Warranty on Structural Components5 Year / 50,000 Miles Warranty on Exhaust Emission (CARB Models)
      $153.73 - $789.09
    • (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...
      Direct OEM replacementConverts harmful engine emissions to less dangerous gases and water vapor
      $159.60 - $787.20
    • (2 reviews)
      # sp20037
      Manifold with Integrated Catalytic Converter by Bosal®. Converter Configuration: Direct Fit. Catalytic Series: Premium Load. CARB Compliant: No. If you’re in need of a replacement catalytic converter, you can’t do better than...
      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
      $172.45 - $541.48
    • (2 reviews)
      # sp95244
      Exhaust Manifold With Integrated Catalytic Converters by Dorman®. More like a complete kit than a single part, many of the Exhaust Manifolds include gaskets and hardware for a complete installation. Since this part is a direct...
      Includes heat-shield for protection of hoses, wiring, and other engine componentsCast iron or stainless tubular construction protects against warping and/or cracking
      $151.70 - $1,155.00
    • (2 reviews)
      # sp6943
      Exhaust Manifold with Integrated Catalytic Converter by Dorman®. More like a complete kit than a single part, many of the Exhaust Manifolds include gaskets and hardware for a complete installation. Since this part is a direct...
      Includes heat-shield for protection of hoses, wiring, and other engine componentsCast iron or stainless tubular construction protects against warping and/or cracking
      $151.70 - $1,155.00
    • (0 reviews)
      # sp9246
      Exhaust Manifold with Integrated 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...
      Direct fitMade from a heavy duty stainless steel outer shell
      $222.60 - $1,301.21
    • (0 reviews)
      # sp99524
      Exhaust Manifold with Catalytic Converter by PaceSetter®. If you want to get the most out of your vehicle, this PaceSetter product is second to none. Engineered with meticulous attention to detail, it guarantees impeccable quality...
      Catalytic Converters are a direct replacement for original equipmentEngineered for durability and ease of installation
      $143.14 - $274.95
    • (3 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...
      EPA & CARB Emissions Products Available for Most VehiclesEmission, Structural Warranty: 5 Years / 50,000 Miles (80,000 Kilometers)
      $49.43 - $415.03
    • (11 reviews)
      # sp26979
      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 industry...
      Designed to meet your vehicle’s specific emissions requirementsDirect fit replacement
      $110.04 - $832.96
    • (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....
      EPA & CARB Emissions Products Available for Most Vehicles5 Year / 50,000 Miles Warranty on Structural Components
      $49.43 - $108.28
    • (8 reviews)
      # sp4303
      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 Walker,...
      Flange to flange, direct fit design bolts to existing exhaustEPA & CARB Emissions Products Available for Most Vehicles
      $69.60 - $463.61
    • (17 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)
      $76.07 - $842.09
    • (0 reviews)
      # sp4295
      Universal Fit Catalytic Converter by Eastern Catalytic®. 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...
      Universal fitConverts harmful engine emissions to less dangerous gases and water vapor
      $32.26 - $260.28
    • (0 reviews)
      # sp21034
      Universal Fit Torpedo 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...
      Universal fitConverts harmful engine emissions to less dangerous gases and water vapor
      $292.00 - $295.98
    • (14 reviews)
      # sp4294
      Direct Fit Catalytic Converter by Eastern Catalytic®. 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...
      Direct OEM replacementConverts harmful engine emissions to less dangerous gases and water vapor
      $34.42 - $1,086.65
    • (0 reviews)
      # sp21031
      Direct Fit Diesel Particulate Filter by Eastern®. Eastern offers a full line of catalytic converters designed for all types of Diesel engines. If you need to replace your failed or damaged catalytic converter, this product is the...
      Direct OEM replacementConverts harmful engine emissions to less dangerous gases and water vapor
      $249.00 - $1,955.38
    • (1 review)
      # sp94077
      Universal Fit Catalytic Converter by AP Exhaust®. Three-Way No / Air OBDII By Design US-EPA Compliant catalytic converters are efficient at the oxidation of HC’s and CO, and very efficient at the reduction of NOx, storing O2, and...
      Manufactured from high quality materialsDesign meet needs of OBDII equipped vehicles
      $49.38 - $341.58
    • (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...
      Gain maximum efficiency and operating economyCleaner exhaust
      $1,193.50 - $3,594.75
    • (2 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...
      Manufactured from high quality materialsDesign meet needs of OBDII equipped vehicles
      $54.47 - $1,122.56
    • (9 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...
      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
      $54.13 - $839.06
    • (0 reviews)
      # sp20707
      Diesel Particulate Filter by Dorman®. The Diesel Particulate Filter (DPF) is an integral component for diesel trucks and helps to maintain the proper performance of the diesel engine. Essential for keeping harmful emissions out of...
      Direct replacement for a proper fit every timeReplacement is designed to match OE fit, form, and function
      $1,233.91 - $1,679.14
    • (0 reviews)
      # sp1394
      Catalytic Converter by Omix-Ada®. The catalytic converter converts harmful gases like Carbon Monoxide (CO) and unburned Hydrocarbons (HC) into less harmful gases like water vapor and Carbon Dioxide (CO2). The converter on your Jeep...
      Reduces harmful emissionsRestores performance
      $150.15 - $887.99
    • (6 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...
      Direct fitMade from a heavy duty stainless steel outer shell
      $82.60 - $1,271.88
    • (0 reviews)
      # sp20134
      Diesel Particulate Filter by A1 Cardone®. Advanced exhaust systems on diesel vehicles play an integral role in reducing emissions to an environmentally friendly level.
      After reassembly, units are media blasted and coated to renew exterior appearance and increase corrosion protection.All applicable O.E.-quality temperature sensors and sealing gaskets are provided to ensure a complete repair.
      $762.15 - $808.96
    • (0 reviews)
      # sp99529
      Direct Fit Catalytic Converter by Crown®. Crown Automotive is just the ticket if you want to get the most out of your vehicle as well as revel in a more exciting driving experience. You will surely get a real bang for the buck!
      Developed to improve your driving experienceConstructed to ensure ultimate operation
      $217.75 - $856.48
    • (0 reviews)
      # sp4222
      Catalytic Converter by Crown®. Crown Automotive is just the ticket if you want to get the most out of your vehicle as well as revel in a more exciting driving experience. You will surely get a real bang for the buck!
      Developed to improve your driving experienceConstructed to ensure ultimate operation
      $217.75 - $856.48
    • (3 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...
      Catalytic Converters are a direct replacement for original equipmentEngineered for durability and ease of installation
      $86.81 - $373.54
    • (0 reviews)
      # sp29963
      Direct Fit Catalytic Converter by PaceSetter®. If you want to get the most out of your vehicle, this PaceSetter product is second to none. Engineered with meticulous attention to detail, it guarantees impeccable quality and...
      Direct-Fit Catalytic Converters are a direct replacement for original equipmentManufactured using mandrel-bent 16-gauge and stainless steel tubing
      $91.38 - $477.53
    • (7 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...
      Helps your vehicle emit harmless gasesDirect OEM replacement
      $18.21 - $2,465.79
    • (0 reviews)
      # sp6393
      Exhaust Gasket by Beck Arnley®. For one hundred years, Beck/Arnley has been providing premium OE quality parts for vehicles. Beginning with motorcycle parts in 1914 and transitioning to import vehicles in the 1950’s, brand...
      OE quality products from top original equipmentTop quality materials
      $1.89 - $47.06
    • (0 reviews)
      # sp98769
      Air Tube Kit by Walker®. With their extensive selection of accessories and hardware for the exhaust system, Walker will provide you with everything needed to do the complete exhaust job. When you choose Walker accessories, you get...
      Makes installation quick and easyOptimal OE-style fit and quality
      $17.74
    • (0 reviews)
      # sp20702
      DPF Clamp Repair Kit by Dorman®. Dorman has all the components needed for a complete repair. Quickly and easily installed, it eliminates the clunking noise that may result when this part fails, while restoring original ride control.
      Easy to installDirect replacement for a proper fit
      $171.95
    • (0 reviews)
      # sp32492
      Rear Exhaust Heat Shields by Auto Metal Direct®, 1 Pair. The restoration experts at Auto Metal Direct manufacture correct OE-quality replacement parts that will help you restore your vehicle to its original condition. Authentic...
      Direct fit replacementMade according to OE specs
      $53.99
    • (0 reviews)
      # sp29850
      Universal Clamps by AP Exhaust®. This superior product was carefully designed with key attention to detail and manufactured from high-grade materials to the strict standards of the highest quality. This AP Exhaust Technologies...
      Made from first-rate materialsEnsures outstanding durability
      $0.80 - $0.89
    • (1 review)
      # sp93975
      Exhaust Gasket by AP Exhaust®. This superior product was carefully designed with key attention to detail and manufactured from high-grade materials to the strict standards of the highest quality. This AP Exhaust Technologies...
      Made from first-rate materialsEnsures outstanding durability
      $0.60 - $82.33
    • (0 reviews)
      # sp5612
      Catalytic Converter Gasket by Victor Reinz®. 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...
      High quality at an affordable priceExpertly made from premium materials
      $1.62 - $38.23
    • (0 reviews)
      # sp5330
      Catalytic Converter Gasket by AJUSA®. If you need durable gaskets to prevent leaks on your vehicle, Ajusa is the way to go. Engineered using the latest technologies and global engineering resources, the gaskets meet specific OEM...
      Direct OEM replacement for a proper fitEnsure reliable sealing performance
      $1.05 - $6.08
    • (0 reviews)
      # mpn998428
      Exhaust Bolt by Bosal®. Bosal has a vast selection of all necessary accessories and hardware to help you make the exhaust system installation or repair job quick and easy. Choose Bosal, and you'll get OE-quality parts and...
      Constructed for a hassle-free exhaust repairEnsures a precise fit
      $8.56
    • (0 reviews)
      # mpn998428
      Exhaust Bolt by Bosal®. Bosal has a vast selection of all necessary accessories and hardware to help you make the exhaust system installation or repair job quick and easy. Choose Bosal, and you'll get OE-quality parts and...
      Constructed for a hassle-free exhaust repairEnsures a precise fit
      $8.56
    • (0 reviews)
      # mpn998428
      Exhaust Bolt by Bosal®. Bosal has a vast selection of all necessary accessories and hardware to help you make the exhaust system installation or repair job quick and easy. Choose Bosal, and you'll get OE-quality parts and...
      Constructed for a hassle-free exhaust repairEnsures a precise fit
      $8.56
    • (0 reviews)
      # mpn998429
      Exhaust Bolt by Bosal®. Bosal has a vast selection of all necessary accessories and hardware to help you make the exhaust system installation or repair job quick and easy. Choose Bosal, and you'll get OE-quality parts and...
      Constructed for a hassle-free exhaust repairEnsures a precise fit
      $4.51
    • (0 reviews)
      # mpn998428
      Exhaust Bolt by Bosal®. Bosal has a vast selection of all necessary accessories and hardware to help you make the exhaust system installation or repair job quick and easy. Choose Bosal, and you'll get OE-quality parts and...
      Constructed for a hassle-free exhaust repairEnsures a precise fit
      $8.56
    • (0 reviews)
      # mpn998428
      Exhaust Bolt by Bosal®. Bosal has a vast selection of all necessary accessories and hardware to help you make the exhaust system installation or repair job quick and easy. Choose Bosal, and you'll get OE-quality parts and...
      Constructed for a hassle-free exhaust repairEnsures a precise fit
      $8.56
    • (0 reviews)
      # mpn998429
      Exhaust Bolt by Bosal®. Bosal has a vast selection of all necessary accessories and hardware to help you make the exhaust system installation or repair job quick and easy. Choose Bosal, and you'll get OE-quality parts and...
      Constructed for a hassle-free exhaust repairEnsures a precise fit
      $4.51
    • (0 reviews)
      # mpn998429
      Exhaust Bolt by Bosal®. Bosal has a vast selection of all necessary accessories and hardware to help you make the exhaust system installation or repair job quick and easy. Choose Bosal, and you'll get OE-quality parts and...
      Constructed for a hassle-free exhaust repairEnsures a precise fit
      $4.51
    • (0 reviews)
      # mpn998423
      Exhaust Bolt by Bosal®. Bosal has a vast selection of all necessary accessories and hardware to help you make the exhaust system installation or repair job quick and easy. Choose Bosal, and you'll get OE-quality parts and...
      Constructed for a hassle-free exhaust repairEnsures a precise fit
      $4.27
    • (0 reviews)
      # mpn998423
      Exhaust Bolt by Bosal®. Bosal has a vast selection of all necessary accessories and hardware to help you make the exhaust system installation or repair job quick and easy. Choose Bosal, and you'll get OE-quality parts and...
      Constructed for a hassle-free exhaust repairEnsures a precise fit
      $4.27
    • (0 reviews)
      # mpn998428
      Exhaust Bolt by Bosal®. Bosal has a vast selection of all necessary accessories and hardware to help you make the exhaust system installation or repair job quick and easy. Choose Bosal, and you'll get OE-quality parts and...
      Constructed for a hassle-free exhaust repairEnsures a precise fit
      $8.56
    • (0 reviews)
      # mpn998423
      Exhaust Bolt by Bosal®. Bosal has a vast selection of all necessary accessories and hardware to help you make the exhaust system installation or repair job quick and easy. Choose Bosal, and you'll get OE-quality parts and...
      Constructed for a hassle-free exhaust repairEnsures a precise fit
      $4.27
    • (0 reviews)
      # mpn998428
      Exhaust Bolt by Bosal®. Bosal has a vast selection of all necessary accessories and hardware to help you make the exhaust system installation or repair job quick and easy. Choose Bosal, and you'll get OE-quality parts and...
      Constructed for a hassle-free exhaust repairEnsures a precise fit
      $8.56
    • (0 reviews)
      # mpn998428
      Exhaust Bolt by Bosal®. Bosal has a vast selection of all necessary accessories and hardware to help you make the exhaust system installation or repair job quick and easy. Choose Bosal, and you'll get OE-quality parts and...
      Constructed for a hassle-free exhaust repairEnsures a precise fit
      $8.56
    • (0 reviews)
      # mpn998429
      Exhaust Bolt by Bosal®. Bosal has a vast selection of all necessary accessories and hardware to help you make the exhaust system installation or repair job quick and easy. Choose Bosal, and you'll get OE-quality parts and...
      Constructed for a hassle-free exhaust repairEnsures a precise fit
      $4.51
    • (0 reviews)
      # mpn998429
      Exhaust Bolt by Bosal®. Bosal has a vast selection of all necessary accessories and hardware to help you make the exhaust system installation or repair job quick and easy. Choose Bosal, and you'll get OE-quality parts and...
      Constructed for a hassle-free exhaust repairEnsures a precise fit
      $4.51
    • (0 reviews)
      # mpn998428
      Exhaust Bolt by Bosal®. Bosal has a vast selection of all necessary accessories and hardware to help you make the exhaust system installation or repair job quick and easy. Choose Bosal, and you'll get OE-quality parts and...
      Constructed for a hassle-free exhaust repairEnsures a precise fit
      $8.56
    • (0 reviews)
      # mpn998428
      Exhaust Bolt by Bosal®. Bosal has a vast selection of all necessary accessories and hardware to help you make the exhaust system installation or repair job quick and easy. Choose Bosal, and you'll get OE-quality parts and...
      Constructed for a hassle-free exhaust repairEnsures a precise fit
      $8.56
    • (0 reviews)
      # mpn998429
      Exhaust Bolt by Bosal®. Bosal has a vast selection of all necessary accessories and hardware to help you make the exhaust system installation or repair job quick and easy. Choose Bosal, and you'll get OE-quality parts and...
      Constructed for a hassle-free exhaust repairEnsures a precise fit
      $4.51
    • (0 reviews)
      # mpn998429
      Exhaust Bolt by Bosal®. Bosal has a vast selection of all necessary accessories and hardware to help you make the exhaust system installation or repair job quick and easy. Choose Bosal, and you'll get OE-quality parts and...
      Constructed for a hassle-free exhaust repairEnsures a precise fit
      $4.51
    • (0 reviews)
      # mpn998429
      Exhaust Bolt by Bosal®. Bosal has a vast selection of all necessary accessories and hardware to help you make the exhaust system installation or repair job quick and easy. Choose Bosal, and you'll get OE-quality parts and...
      Constructed for a hassle-free exhaust repairEnsures a precise fit
      $4.51
    • (0 reviews)
      # mpn998429
      Exhaust Bolt by Bosal®. Bosal has a vast selection of all necessary accessories and hardware to help you make the exhaust system installation or repair job quick and easy. Choose Bosal, and you'll get OE-quality parts and...
      Constructed for a hassle-free exhaust repairEnsures a precise fit
      $4.51




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    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  4.5 - 199 reviews
      /  Read All Catalytic Converters Reviews
    4.8 of 5
    Perfect Fit (Passed Emissions Test)!
    Had a little problem with the shipping confirmation but other than that everything was perfect. Part arrived earlier then expected, looked just like the picture on acrid great condition. Installation was quit and easy bolted right on.
    RPosted by Ruben (Bakersfield, CA) / December 16, 2016
    2003 Mitsubishi Lancer
    Was this review helpful for you? Yes
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