Best Walker Catalytic Converter Reviews


Walker was founded in 1916. Since then, it has been a leader in the emission control product sector. They have a complete line of exhaust products and emission controls for both the original equipment manufacturer and replacement markets.

You can fit these converters to both domestic and import vehicles. This article discusses catalytic convertors and offers the best Walker catalytic conversion reviews to help you choose a suitable CAT converter.

Review of Best Walker Catalytic Converters

You can use Amazon’s vehicle selection tool to determine if these converters match your vehicle. Below is a list of reviews of top-selling Walker Catalytic converters.

1. Walker 16468 Ultra Direct Fit Catalytic Converter. Check it on Amazon.

This converter is the most popular fit for Nissan vehicles. It works on the Frontier 2005-2011, NV1500 2012, Pathfinder 2005–2010, and Xterra 2005–2010 models. Its flange-to-flange design allows it to be bolted to the existing exhaust.

Walker 16468 is a popular product. It is a top-selling model due to its high precious metals and excellent substrate content.

2. Walker 16167 Ultra EPA Certified Catalytic Converter

Another ultra EPA-certified CC. This CC is designed for OBDII 1996 and later vehicles. Because it bolts to the existing exhaust, it is easy to install. The pipe heat shield and body made of stainless steel add strength and durability. The substrate material for the 16167 is ceramic. It is used frequently in Honda CR-V vehicles.

3. Walker 93271 Ultra EPA Certified Universal Catalytic Converter

The Walker catalytic convert fits my 2014 Fusion Ford SE Hybrid equipped with a 2.0L4 Engine, an original equipment manufacturer design, and includes all brackets, hangers, and flanges. The body is stainless steel, and the pipe is heat-shielded for added durability. If the tube comes in contact with road debris or particles, the structural brace will protect you from any damage.

The ultra EPA-certified vehicle has an emissions warranty for 25,000 miles, equivalent to 40,000 km. The structural warranty can last up to five years or 50,000 miles, depending on when it occurs.

4. Walker 80905 CalCat Universal Catalytic Converter

The Walker 80905 catalytic converter is top-rated and can be used on a variety of vehicles, including:

  • Chevrolet
  • Dodge
  • Ford
  • Nissan
  • Toyota
  • Pontiac
  • Oldsmobile
  • Plymouth
  • Isuzu
  • Mercury
  • Mazda
  • Landrover
  • Trucks internationally
  • GMC
  • Honda

It is legal to use in California, compliant with California Air Research Board regulations. This compliance is achieved using the CalCat technology. It also provides a 5-year/50,000-mile performance warranty and structural integrity warranty.

How Do Catalytic Converters Work?

The code is often linked to the emissions system by the vehicle’s onboard diagnosis. The problem is most often in the ignition, fuel, and engine. All of these issues can impact the performance of the catalytic converter.

It is responsible for reducing harmful particles and substrates emissions using its complex technology. The engine’s combustion chamber is supplied with a controlled amount of fuel and air. This mixture quickly expands as it burns and creates the mechanical power that drives the vehicle’s wheels.

The remaining gases are then pushed out of your engine into the exhaust stream. Three main elements are included in these gases: nitrogen oxide, carbon monoxide, and unburned hydrogens. The catalytic converter uses a substrate coated with precious metals to convert the pollutants into water vapor and carbon dioxide.

Early converters used the oxidation process to clean up hydrocarbons and carbon monoxide in early converters. It is essential to realize that lean burning is better for the engine than oxidization. Emission regulations have become more stringent over the years, so vehicle manufacturers must clean up any CO, HC, or nitrogen oxide. However, nitrogen oxide conversion requires a higher fuel-to-air ratio, unlike oxidization, a process known as a rich mixture.

Engineers found a way to make the engine run rich and lean using 3-way converters. Modern 3-way converters, such as Walker units, have an advanced catalyst that stores oxygen and releases it. This catalyst works with engine controls to change the air-fuel mixture from lean to rich, ensuring proper carbon monoxide, hydrocarbons, and nitrogen oxide removal.

Why Catalytic Converters Die-Out

Many problems can cause damage to a converter. These must all be fixed before you install a new unit. Below are four types of main issues that can cause a converter to fail:

Substrate Poisoning

Poisoning refers to the internal honeycomb substrate’s decay. The substrate’s ability to remove emitted gases will decrease once contaminated. Some well-known poisons can cause damage to the substrate, including antifreeze/coolant and gasoline. An engine problem can be caused by antifreeze in the exhaust stream with a cracked, leaky cylinder or a failed intake manifold seal. Composite intake manifolds make it difficult to detect leaks in the intake manifold. A vehicle equipped with a catalytic converter should not be used for leaded fuel.

Substrates That Have Been Oil or Coated

The substrate is a small ceramic block with squared courses. The exteriors of the substrate are then covered with a wash and a mix of precious metals. These channels are responsible for the biochemical reactions that clean up engine emissions. The converter will not meet emission standards if the precious metals cannot reach the exhaust flow. Excessive carbon buildup and excessive oil consumption are the most common causes of a coated substrate. Critical engine damage can be caused by excessive oil consumption.

Substrates That Have Been Overheated or Melted

This problem is usually caused by excessive hydrocarbons, carbon monoxide, and nitrogen oxide in the exhaust flow, most likely due to a fuel quality or control problem. Wearing oxygen sensors, low engine compression, and restricted air cleaner are other possible causes.

Load damage

Most structural load damage occurs from road debris that should be obvious to see on a shielded converter shell. Corrosion from road salt, stress fractures, and torn oxygen sensor threads are all examples of material damage. Another common form of physical harm is when the converter operates in high temperatures and suddenly becomes cold-damaged in water from large puddles or snow or ice. The converter substrate can be damaged by thermic confusion.

All four of these cases require that the problem be addressed before installing a replacement catalytic converter.


Remember that most states regulate their emissions through the Environmental Protection Agency. You must follow California’s CARB regulations and laws if you live in California. This detailed guide to the best Walker catalytic convertor reviews is hoped to be helpful. Walker is the best choice for a replacement catalytic converter on your vehicle.


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