Catalytic Converters & Components

Catalytic Converter Kits, Gaskets, Test Pipes, Combination Converters/Manifolds

To cure the air pollution problem, government adopts clean-air laws, while car manufacturers refine fuel systems. Perhaps, one of the most important refinements is a catalytic converter. When operating in the right way, this fine-tuned device converts harmful gases produced by the engine into less hazardous substances. However, when the converter develops problems, your vehicle will experience certain performance issues.

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The catalytic converter (AKA catcon or cat) was first introduced in the mid-70's, and back then, it performed only two tasks, which is exactly why it was called a two-way converter. It oxidized carbon monoxide to carbon dioxide and hydrocarbons to water and carbon dioxide (oxidation stage). In 1981, the two-way converter was replaced by a much more efficient three-way catcon, which additionally reduced nitrogen oxide emissions (reduction stage). Today, the two-way version is used in diesel applications only, while most vehicles are equipped with a three-way catalytic converter.

We aim to provide our customers with the finest Catalytic Converters & Components the industry can offer, which is why we accept no compromise when it comes to the quality. Created by the most reputable names in the industry, such as Walker, Dorman, Bosal, Eastern Catalytic, Genuine the Catalytic Converters & Components we've gathered for you feature precise design and everlasting durability.

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No matter of its type, whether it's two-way or three-way, the catalytic converter is an integral part of a vehicle's emission control system. Located withing the exhaust system, between the engine and muffler, the converter actually resembles a muffler in shape, though the construction of the converter as well as its job is very different from that of a muffler. The body of today's catalytic converters is usually made of stainless steel. Inside the body, you'll find an insulated chamber, which contains three main components of any catalytic converter: substrate (or catalyst core), washcoat, and catalyst.

The catalyst core usually has a honeycomb structure, and it's most often a ceramic monolith. Basically, it serves as a support for the washcoat. The washcoat itself is a carrier for the catalytic materials. Materials for the washcoat are chosen to form an irregular surface, which maximizes the catalytically active layer available to react with the exhaust gases. And then comes the catalyst, which is most ofter a mixture of precious metals such as palladium (oxidation catalyst) and rhodium (reduction catalyst). When the exhaust stream passes through the converter, it contacts with the catalyst and all the toxic elements covert into the harmless substances. The leaving gas is monitored by the control system to make sure it meets the emissions requirements.

There are several reasons for the converter to fail. The most common problem is surely physical damage, which can be caused by road debris or metal fatigue. It can be easily diagnosed by visual examination. Other cases are not that easy to trace, and then, you'll have to rely on the on-board computer. So, what can happen? First off, the substrate can get contaminated by the leaded fuel or antifreeze. Second, the substrate may fail because of excessive carbon build-up. Melted or overheated substrate can also cause a lot of problems. If any of the above is the case, it can be a sign of serious engine problems, and then make sure all systems work properly before you replace the converter. Otherwise, the replaced unit will suffer the same fate.

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Replacement Catalytic Converters Reviews
Average rating: 4.5 4.7 - 100 reviews
2006 Subaru Legacy | Posted by Daniel | (Woodbridge, VA)

Product looks good, materials used are good quality, need improvement in welding, installation easy to medium one nut on each side of flanges hard to tighten. Original converter much easy to install.

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