Best Aftermarket Catalytic Converter – Expert Review and Buying Guide 2021

Catalytic converter acts on exhaust gases to minimize toxic emissions, making it a vital part of a car. Unfortunately, catalytic converter malfunctions over time due to the breakdown of internal components from demanding regular use or poor engine maintenance conditions. So, the replacement of CC is necessary to get optimum performance from your vehicle.

CC replacing cost is quite expensive, and most car owners will question whether it is worth replacing. Well, the catalytic converter is essential for your car and the earth’s environment. Moreover, by law, all cars, motorcycles, buses, trucks must have a built-in CC. Furthermore, in some states, if CC is unavailable in your vehicle, you may have to give a penalty of $1000.

So, in order to avoid penalties and get optimum car performance, your damaged CC needs to be replaced with the best aftermarket catalytic converter.

This comprehensive guide will help you buy the best-suited CC for your vehicle.

Continue reading.

Why Buy an Aftermarket Catalytic Converter?

Generally, all vehicles come with a catalytic converter to vent gases from the engine. Aftermarket exhaust delivers quite a several benefits. Here are some significant reasons why you should buy an aftermarket CC.

More Power: One of the best benefits of an aftermarket cat is, it offers more performance and power. The amount of backpressure in your exhaust will reduce once you use aftermarket CC. As a result, your vehicle engine will get several HP.

Although the performance boost will not be similar as you get after installing a supercharger or turbocharger, your vehicle power and performance will surely increase. It is because the backpressure reduces the power of an engine. Since backpressure is necessary and you can’t eliminate it, minimizing it gives your vehicle additional power.

The better gases can escape and free up energy for other functions. That is why clogged or old exhaust cats minimize engine performance and need to be replaced.

Boost Up Fuel Economy: Yes, aftermarket CC helps you save fuel. Again, the savings are not huge but remarkable to make a difference. Another worth mentioning benefit is less fuel consumption means, reduction of carbon footprint. The planet and your earth will surely thank you.

Noise Controlling: This one is not important for all, based on your preferences and age. However, your vehicle noise control will dramatically improve after installing aftermarket CC.

Complies with State Law: Another advantage of the aftermarket cat is that manufacturers pay attention to the need for strict emissions when designing these exhaust systems. Moreover, it helps you comply with state law for carbon emissions, depending on the state on which your can is registered.

Many states have carbon emission laws that need to be followed mandatorily. Otherwise, the car owner has to pay the penalty. So, having an aftermarket CC means it saves valuable money.

Other benefits are,

  • Aftermarket catalytic converters reduce 87% of hydrocarbon, 85% CO and 62% nitrous oxide emission.
  • These tools will help you attain better gas mileage.

What are the Types of Catalytic Converters?

Cat-cons are 3 types which are oxidation catalyst, dual-bed, and 3-way catalytic converter. Every class is distinctive in their characteristics.

Oxidation Catalyst: This type is efficient enough in reducing toxic gases such as CO (Carbon Monoxide) and HC (Fuel Hydrocarbon) in the exhaust. At the same time, it frequently uses a secondary air injection. However, oxidation catalyst reduces a portion of harmful gases.

Dual-Bed Catalyst: Dual-bed catalysts offer more perfection compared to oxidation catalysts. It performs the following 2-stage. Also, they are equipped with 2-elements that are positioned behind one another.
The 1st stage is responsible for minimizing the emissions of Nitrogen Oxide. While the 2nd stage blocks hydrocarbon emissions that get generated by carbon monoxide and unburned fuel. Secondary air injection is also available in the 2-stage catalytic converter.

3-Way Catalytic Converter: The responsibility of a 3-way catalytic converter is to convert the harmful gases into not hurtful gases which get exhausted from the engine. Hazardous substances like carbon monoxide, hydrocarbons and oxides of nitrogen get emitted from engine exhaust. These gases severely harm the environment. The 3-way catalytic converter converts these gases into less harmful nitrogen, water and CO2.

10 Best Aftermarket Catalytic Converter – Expert Review and Buying Guide 2021

Consider reading these enlisted 10 aftermarket catalytic converter reviews. All the cat-cons delightfully serve the purposes. Read the complete review section carefully. But keep in mind to choose the unit that meets your requirement most.

1# MAYASAF 2” Inlet/Outlet Universal Catalytic Converter

Key Features

  • High-quality HD stainless steel construction
  • Durable and heat-resistant
  • Easy to install
  • Withstand extreme environments effectively
  • EPA certified
MAYASAF 2″ Inlet/Outlet Universal Catalytic Converter

The MAYASAF 2” Inlet/Outlet Universal Catalytic Converter is manufactured to meet high-quality standards that even exceed OE quality. It is made of HD-stainless steel with a high-flow design, providing more oxygen for increased performance and power. In addition, this is rigorously tested for severe weather conditions, making it heat-resistant.

Due to its high-quality construction, the internal components are protected. The design ensures that it will remain efficient as much as possible for many days. You don’t have to spend a hard time installing it because of its easy installation process to the existing exhaust system. However, professional assistance is necessary to install it.

With a 2” outer diameter exhaust pipe, it is universal for vehicles. Besides, the unique surface allows the catalyst to contact the exhaust gas ideally. Also, for its characteristic design, the flow rate increases for optimum performance from your car. But it is not valid for use in vehicles required to meet California emission standards.


  • It increases engine performance and power
  • Suitable for use under extreme conditions
  • It’s quiet and has a distinguished look


  • Non-compliant for use in California

2# Walker Exhaust Ultra EPA 16337 Catalytic Converter

Key Features

  • Rugged construction
  • Direct-fit design
  • EPA compliant
  • OE-style design
  • No break-in required
Walker Exhaust Ultra EPA 16337

The Walker Exhaust Ultra EPA 16337 Catalytic Converter is considered one of the rugged converters in the market for its high-quality construction. It is a nice fitting CC for multiple vehicles, and the impressive feature is that specialized welding or fabrication is unnecessary for installing it. This means the installation process is a breeze.

This cat-con is manufactured with an aluminized heat shield to match the OE design. Moreover, this feature protects the undercarriage from excessive heat generated by the converter. Furthermore, the ruggedly built brackets, hangers, and flanges hold the converter in the right place. The combination of these features ensures the longevity of the device, making it worth the price.

Additionally, it meets the OBD2 requirements of 1996 and newer vehicles. However, it is not legal for use in California, but megacities like New York approves the use of this cat-converter. Also, the optimal wash-coat technology keeps the check engine lights off for emissions code. Overall, it ensures the right amount of harmful gas emissions to keep the environment safe and improve engine performance.


  • Eliminates check engine light
  • Reliable material construction
  • Welding or fabrication is entirely unnecessary


  • Non-compliant in some states

3# Walker 93253 Universal Catalytic Converter

Key Features

  • OBD2 and EPA compliant
  • Outstanding performance
  • Customizable installation
  • Optimal high-technology washcoat design
  • Resists overheat effectively
Walker Exhaust Ultra EPA 93253

Are you planning to change or replace your vehicle catalytic converter? Don’t look further; buy the Walker 93253 Universal Catalytic Converter that is OBDII and EPA compliant. This cat-converter is compatible with vehicles of 1996 and newer. Even a few customers claim that it perfectly matches their 1980’s car. Unfortunately, similar to the previous model, it is not CARB compliant; you can’t install them in your car if you live in California.

With a 2.5” inlet and outlet, this CC will fit maximum exhaust pipes, and more importantly, minimum welding is required. However, measure your vehicle’s exhaust pipe diameter before buying this particular unit. In addition, durable stainless steel is used in the exterior of this CC, making it suitable for heavy-duty driving.

Although an O2 port is unavailable in this unit, it is much more efficient in minimizing the amount of exhaust from your old vehicle. Moreover, it is a high-flow cat-con explicitly designed to prevent triggering your car’s MIL indicator. Finally, its length is 11.5”, which means you will not face trouble installing it into your vehicle’s exhaust pipe.


  • Includes ceramic substrate
  • Compatible with 1980’s vehicles as well
  • It doesn’t trigger the check engine light


  • Welding or fabrication required during installation

4# AutoShack EM26339 EPA Compliant Catalytic Converter

Key Features

  • Clamp-on connection
  • Direct-fit installation
  • Hardware included
  • Long-lasting performance
  • It fits very well
AutoShack EM26339

The AutoStick EM26339 EPA Compliant Catalytic Converter is designed to offer effortless installation with its direct-fit system. It confirms the installation hassle will be minimized, and finding the right cat-con for your vehicle will be easy. This unit is compatible with various cars, especially a perfect replacement for the 2004 – 2009 Toyota Prius 1.5L.

It has a powder coating finish that makes it scratch-proof, increasing the shelf-life of the unit. Moreover, car owners highly appreciated its high-grade structure, compact design and clean finish. Also, it is fulfilling the standard and regulations of OBD2 and EPA. For car applications, this one is proved to be one of the best catalytic converters.

Moreover, this device fits well and using the provided U-ring clamp is good enough. The improved flow boosts your car’s efficiency by reducing fuel consumption and enhancing the HP. Furthermore, it protects the vehicle engine from overheating. At the same time, it removes filthy exhaust smells. Finally, with high emission control, it offers stable efficiency.


  • Top-notch durability
  • Sturdy and rugged construction
  • Highly efficient
  • Even exhaust flow
  • Sounds are perfect


  • Not certified to be used in Maine, Colorado, California, New York

5# Factory Style Catalytic Converter

Key Features

  • Stainless steel catalytic converter body
  • CNC machined stainless steel flange
  • Oxygen sensor plug
  • Mandrel-bends stainless steel pipes
  • EPA OBDII approved
Factory Style Catalytic Converter by Auto Dynasty

The Factory Style Catalytic Converter helps cars reduce harmful emissions and improve the performance of your vehicle. It is engineered for a secure fit and provides EPA-compliant performance. The direct-fit feature design makes it an exact replacement for your factory-installed catalytic converter. Moreover, your car won’t require additional modifications like welding or fabrication for you to put in a converter.

Exceptional oxygen storage capacity is guaranteed for its high-technology wash-coat and high-quality substrate material in the inner shell. Simultaneously, this cat-con provides the best performance during the most challenging emission issues. Besides, due to its OEM components, it matches well with most vehicles.

Many customers are dissatisfied with the performance of their current catalytic converter. With this unit, you will always be happy since it minimizes engine heat and improves HP. This converter is manufactured to provide consistent, efficient performance following industry standards for dependability.


  • Direct fit unit
  • Made of high-quality components
  • It consists of a reduction catalyst to eliminate nox
  • Cerium and ceramic honeycomb catalytic converter


  • The oxygen sensor ended up rubbing on the frame

6# EvanFischer REPG960301 Catalytic Converter

Key Features

  • 50,000 miles warranty
  • EPA approved catalyst
  • 4-sensor ports
  • Powder-coated exterior
  • Aluminized steel tube
EvanFischer REPG960301

The EvenFischer is a popular manufacturer in the catalytic converter industry. It is because they offer well-designed units without compromising the performance. If you want to draw other people’s attention to the exhaust system, this would be a suitable choice. In addition, it comes with so many impressive features, making it desirable to car owners.

It is a Y-shaped dual inlet, single outlet direct-fit cat-con. The CC looks stylish and unique because of the silver coating. It is compatible to be used for different vehicles from multiple manufacturers. All you need to do so, check whether this CC is ideal for your car or not. With stainless steel construction, it eliminates exhaust smell.

You will have a hassle-free install of this cat-con. In order to fit this in your vehicle, welding or fabrication is not required. More importantly, you can directly fit it using the direct-fit feature. Another worth-mentioning feature is the EPA approval. As a result, it can be used in Federal compliant vehicles in all states but illegal in New York and California.


  • 50.5” length
  • Single outlet
  • Direct-Fit OE Replacement cat-con
  • last longer


Bolts are prone to damage

7# Eastern 70318 Catalytic Converter

Key Features

  • Stainless steel body material
  • 6,000lbs. loading capacity
  • Easy to fit
  • Available in different forms
  • Height: 4.25” and Width: 6”
Eastern 70318 Catalytic Converter

Different forms of Eastern 70318 Catalytic Converter are available: no sensor, 1 sensor, 2 sensors, 1 central sensor, with or without air tube, etc. Simply choose the right tube for your car. The height and width of this cat-con are 4.25” and 6”, respectively.

Moreover, its loading capacity is 6,000lbs. Furthermore, you can fit it effortlessly as per your requirements.

This cat-con is compatible with your SUV, sedan or mini truck. However, we recommend you read the rating meticulously before buying it. Also, be noted that it is EPA certified for all Federal compliant vehicles in all USA states except New York and California. Besides, it is universal; it will work as long as the inlet and outlet are the right sizes.

Another important thing is, the manufacturer provides a warranty up to 50,000 miles. It tells that manufacturers are confident about its long-lasting and efficient performance. More importantly, it comes at an affordable price tag. Needless to say, it improves vehicle performance. At the same time, it reduces fuel consumption and saves valuable money.


  • Better exhaust flow
  • Provides heat shield
  • Suitable for multiple vehicles
  • Universal design


  • Not legal in New York and California

8# Autosver88 Catalytic Converter

Key Features

  • T409 Stainless Steel Body
  • Exclusive EPA Standard Number
  • Internal ceramic substrate
  • Advanced welding tech
  • Meet or exceed OE quality
AUTOSAVER88 Catalytic Converter

The Autosver88 Catalytic Converter combines efficient industrial design and rigorous production processes to meet the highest performance and efficiency standards. The maximum durability of the cat-con is confirmed as the outer shell is made out of heavy-duty stainless steel. Also, for confirming the highest efficiency, precious metal loading and the internal substrate is engineered carefully.

By using robot welding technology, it keeps welding parameters consistent. Thus the thickness and strength of the weld fulfilling the requirement. Compared to traditional manual welding, advanced welding tech can significantly improve the quality and anti-rust ability. Simultaneously, it offers 100% leak-free performance.

In the interior of this CC, it has ceramic substrates. Characteristically, Ceramic substrates have a much higher thermal conductivity than other materials. The cat-con will surely help to keep the check engine light off. Overall, the careful design makes it safe to use and easy to install. Besides, installation is so effortless that it can be done within 20 minutes.


  • Thicker welding seam
  • 100% no leaking
  • Better rust resistance
  • High strength


  • The included bolts are of inferior quality

9# MagnaFlow 99206HM Universal Catalytic Converter

Key Features

  • Universal converter
  • Superior longevity
  • Consistently reliable
  • Quality materials
  • Corrosion-resistant
MagnaFlow 99206HM

With super-quality built, the MagnaFlow 99206HM Universal Catalytic Converter is appreciated by several car owners. The outer surface is so rugged, allowing it to handle heavy-duty use efficiently. This catalytic converter is much more efficient in reducing harmful emissions and keeping the earth pollution-free. It comes with a universal fit and is designed to go with such a simple installation process.

The adaptable universal design helps to keep the check engine lights off. It perfectly fits a wide range of cars but doesn’t forget to check your car’s specifications before investing in this unit. This unit will give you many years of service since it is built to last. In addition, you will never experience substrate leakage as the material is metallic and heat-shield protected.

Due to its universal fit, it directly fits into several cars. You can install this CC on the 2006-2015 Nissan Altima, 2004-2015 Toyota Sienna car models without hesitation. It is a value-adding product at a budget-friendly price tag, and you will never regret buying this unit.


  • Designed to eliminate engine check light
  • Perfect aftermarket replacement component
  • Built to last.


  • Cutting, fabrication or welding may be required

10# MagnaFlow 93419 Direct-Fit Catalytic Converter

Key Features

  • Keep the light off
  • Premium construction
  • Enhanced thermal stability
  • High precious Metal loading
  • High oxygen storage capacity
MagnaFlow Direct-Fit Catalytic Converter

The MagnaFlow 93419 Direct-Fit Catalytic Converter is crafted to meet or exceed professional requirements. Magnaflow ensures that the pipe-like design eliminates toxic emissions and improves efficiency by optimizing airflow. This cat-con meets and exceeds EPA and OBDII emissions requirements. It is specifically designed for the 1999-2006 Chevrolet Silverado 1500, 2000-2006 Chevrolet Tahoe, etc.

Magnaflow uses stainless steel material to manufacture it. The solid and robust material protects the parts inside. It satisfies the car computer control monitoring necessities for the exact applications listed. While guaranteeing long-term reliability, this cat-con turns off the engine light. It fits perfectly on different vehicle types and delivers quiet operation.

Premium material construction makes it corrosion-proof CC. This means it resists rust and corrosion effectively to give you several years of efficient service. If you have little knowledge about different automotive parts, you can install the cat-con of yourself; no professional help is necessary. Thanks to the 25,000-miles emission and 50,000-miles warranty.


  • Excellent fit
  • After installation, it improves to gain mileage
  • It delivers noise-free operation


  • Illegal to use in some states

Buying Guide – How to Buy the Best Aftermarket Catalytic Converter?

Here, we will share every single piece of information that you need to know before buying the best brand aftermarket catalytic converter jeep. Given below are some of the key factors that you need to keep in mind when making a buying decision.

Fitting Type

It is best not to even think about replacing your vehicle’s cat-con if you don’t find a suitable catalyst fitting.
Look for a catalytic converter that is compatible with your car model. A wrongly selected unit will not work properly, and you will experience a hard time.

When the discussion comes about fitting, cat-cons are 2 types: direct fitting and universal fitting.

Direct Fitting

This type of catalytic converter is easy to install at the right location of your car using bolts. The user doesn’t require assistance from a professional while installing them. Direct fitting catalytic converters are the best choice for factory fitted or OED car models.

As it saves installation costs, many vehicle owners prefer it over other types. In addition, with basic knowledge of automotive parts, you can efficiently complete the installation process.

Universal Fitting

Additional modifications are necessary to get accurate performance from the Universal fitting catalytic converter. Moreover, they are not OED components. That is why this type is inexpensive compared to direct fitting.

However, to install universal fitting, professional help is required. So, you will have to pay the installation cost separately.

Emission System

The emission system of a catalytic converter is one of the important aspects that you mustn’t overlook before buying a unit.
In the United States, 2 emission systems are accepted: CARB and Federal regulations. So now you might be wondering, where will I learn the emission system of a product?

Well, you will find it under the hood of your vehicle or in the product detail.

The federal standard regulations follow the carbon regulation created by the environmental protection agency. In comparison, the California Air Resources Board (CARB) is responsible for setting carbon parameters in California.

California strictly follows the measurement parameter, and that is why you won’t see any vehicle with a catalytic converter.

To check whether your car is compatible with CARB regulation or not, check the certification label of your selected cat-con. You will see the manufacturing date, CARB number, part number and installation directions on the label. If your vehicle is originally engineered in California, most probably, your car will be CARB compliant.

However, your vehicle can be non-CARB compliant if it is manufactured in 49 other states of America.

Cat-con Grade

2-main grades of cat-con are available in the market, and customers should look for them before buying. These grades are Heavy Metal Grade OBDII and OEM grade OBDII.
The former corresponds to federal emissions at the 0 and 1 1level. On the other hand, the next corresponds to the California Air

Resources Board.

It would be best to buy a standard catalytic converter if your car was manufactured before 1995 (pre-OBDII).
This is also applicable for pre-OBDII cars manufactured in California State.

Material & Build Quality

Check the constructed material of your selected cat-con. Undoubtedly, you will not get expected performance from the catalytic converter if it is made of inferior quality material. Furthermore, since this unit is installed under a car and the outer shell will get exposed to mud, air, water, dust, etc., it must be strong and rugged enough to withstand accidental pressure or severe situations.

In this case, a cat-con that is made of stainless steel are the best option. Inspect the thickness of the outer shell to understand the cat-cons ruggedness. Moreover, prefer buying a CC with a honeycomb structure. These types are worth the price.

Platinum, rhodium and palladium are some other materials used for manufacturing catalytic converter router shells. These materials are also strong to withstand harsh environments.


Since aftermarket high flow catalytic converters have been used before, they will break down faster compared to new ones. Moreover, they are prone to damage during collisions, and this may lead you to another replacement. In some cases, if the damage is so severe, you may need to replace the whole exhaust system.

The thumb rule is; cheaper aftermarket CC comes with lesser service life. When buying an aftermarket CC, learn the symptoms of a failed catalytic converter and potential problems to avoid the risk associated with a malfunctioned cat-con.

Oxygen Sensor

Every converter comes with a built-in oxygen sensor assisting Engine Control Unit to control the temperature of exhaust gas for ensuring maximum lifetime. A malfunctioned converter will be unable to maintain the required exhaust gas temperature; thus, overheating will happen. More importantly, to meet the regulation of local emission standards of the state or country, you need to replace the failed CC.

So, check the oxygen sensor health before buying a model.

How to Change a Catalytic Converter?

Following 2 different ways, you can change a catalytic converter: by welding or using a bolt.

The former method requires expert help. In contrast, the second way needs little knowledge of automotive parts and the assistance of a few tools.

However, whatever method you choose to change a faulty cat-con, you need to take precautions. Here we shared a safe and effective way of changing a catalytic converter.

Required Items:

  • Wrenches
  • Jack
  • Jack stands
  • Penetrating oil
  • Ratchet joints and extensions
  • Socket and ratchet assortment
  • Goggles

Step 01: Cool Down the Car Exhaust System

If you just turned your vehicle off, give the exhaust system time to cool down so you can avoid burning your skin. Based on the exhaust system of your car, it may take a few minutes.

To check whether the system is cool down or not, wear heavy-duty mechanic gloves and brush your hand against the exhaust tube. If you feel the heat, give more time. If not, then repeat the same process 4/5 times. Once you feel that the exhaust system is cool, proceed to the next step.

Step 02: Park Your Vehicle

Don’t forget to park your vehicle on a flat surface. Also, remember to set the parking brake. Finally, to avoid movement of the tires, place planks of wood or brick or block.

Moreover, disconnect all the positive battery cables to avoid the accidental grounding of the electrical system. Ensure this before you crawl down to your vehicle.

Step 03: Raise Your Vehicle

Don’t assume that changing cat-con is similar to replacing a vehicle tire. It is because while replacing tires, you will need to raise one corner of the vehicle. On the other hand, the whole car needs to be raised when replacing cat-con. For this, use jack stands to raise your vehicle.

Again, check the stability of your parked car because if the surface is not levelled, the jack stands may fail, and an accident can happen.

Once everything is OK, lift your vehicle using the jack stands. Make sure that the car is raised to a good enough height so that you can move freely under the car.

Step 04: Locate the Catalytic Converter

You will find the cat-con behind the exhaust manifold.

Step 05: Remove the Oxygen Sensor

As stated earlier, all cat-con comes with an O2 sensor; remove it. In modern cars, more than one O2 sensor is available. Remove them all. Use an O2 sensor socket and a ratchet wrench to remove the sensor. Then keep aside.

Step 06: Remove the Bolts or Cut the Exhaust System According to the Installation Process

If bolted, apply penetrating oil on the bolts. This will help you to loosen the bolts easily. Even if the bolts are rusted, you will not experience difficulty loosening them.

Make sure to remove the bolts carefully. For this, use the required size of sockets and wrenches.

When following the welding process, use a Sawzall to cut it out. Near the existing weld lines, cut them. After cutting, grab a hammer and knock it out firmly if you still see that it is not coming into use. In this case, be cautious not to leak the converter. At the same time, before you start welding, disconnect the battery.

Step 07: Connecting Exhaust Flange Gasket and Catalytic Converter

To prevent exhaust leaks, connect the exhaust flange gasket and the catalytic converter.

Step 08: Install the Aftermarket CC as per the Process

Then start installing the aftermarket catalytic converter.

For cat-con that require bolting to install, make sure to bolt the cat-con following the proper torque and avoid loosening or over-tightening. Use a good-sized wrench and start tightening the bolt from front to rear side. The cat-con can lead to a leak if the nuts are loose.

On the flip side, a professional-grade welding machine is necessary for installing CC that needs welding. Also, little practice is mandatory to weld the cat-con safely. Join the exhaust system pipe and catalytic converter by welding. Make sure each seal is air-tight.

Step 09: O2 Sensor Reconnection: Re-connect the oxygen sensor to its place.

Step 10: Check Every Connection: Once everything is done, thoroughly check every connection. Be noted that poor connections will lead to leaks.

If you are dissatisfied or confused about your DIY work, call a mechanic to inspect the work. Since cat-con needs to perform at its best, proper installation is necessary.

Tip: You don’t need to remove the O2 sensor before replacing the cat-con in a few modern vehicles. In this case, check with your dealer.

How to Maintain an Aftermarket Catalytic Converter?

Long service life will be ensured when you do the periodic maintenance of the cat-con. Cleaning CC is not a difficult task, and you can do it yourself, taking assistance from a few products. Find the step by step process of maintaining your vehicle’s aftermarket cat-con.

Method 01: For Bolted Cat-con:

This cleaning method is suitable for bolted cat-con.

Step 01: Park Your Car: Park your vehicle on a rigid flat surface. Open the car hood and lift the prop rod. The opened hood will remain stable in its position with the help of the prop rod. Wear goggles and protective gloves.

Step 02: Remove the Converter: Now, we need to remove the converter from the place. Grab a right-sized wrench and remove the nuts that are holding the converter. Store the nuts in a safe place. Then, loosening the bolts, remove the cat-con from your vehicle exhaust system.

Step 03: Check for Any Damage or Cracks: Thoroughly check the CC for any damage. Then, shake the cat-con, and if you hear any sound, be sure; loose parts are there.

Step 04: Clean the Converter

To clean the outer shell, use a soft cloth to wipe away the dust and dirt. You can use a power washer as well to eliminate congealed dirt. Carburetor cleaner can also be a good solution since it removes gunk effectively. Then, into the inlet and outlet, apply force water. This will help to clean the cat-con thoroughly.

Step 05: Leave for Dry: After cleaning with water, leave the cat-con for air dry. Provide enough time for drying and then install it.

Method 02: For Welded Cat-con

Since some cat-cons need to be installed by welding, you can’t remove them from the car. In this case, cleaning is necessary without removing the converter.

Different cleaning aids i.e. car duster are available in the market to clean the converter. However, these aids are not that efficient in clearing damaged components.

After buying a cleaning aid, put it into your fuel tank. Then go for a drive. The product will keep the oxygen sensor and the entire exhaust system clean.

FAQ – Frequently Asked Questions

How Much Does an Aftermarket CC Cost?

Answer: The range of aftermarket catalytic converters is $50 – $200. Usually, aftermarket CC is used to save money. By buying them, you will save more than 80% on the price of a new one.

How Aftermarket Catalytic Converters Increase HP?

If your car’s engine isn’t full of performance-upgrading features, you may not get the HP boost you are looking for.

  • HP boost will happen only in heavily modified vehicles.
  • On average, the maximum increase in the HP will be 6 – 50HP.
  • High flow cat-cons will boost up the emission rating.

What is the Average Lifespan of Aftermarket Catalytic Converters?

Generally, aftermarket catalytic converters last a maximum of 50,000 miles or 5-years. However, the enlisted models of cat-con will give up to 7 years of service when maintenance is done properly. Therefore, inspect aftermarket CC periodically and take prompt action against any damage or cracks.

When to Change my Catalytic Converter?

Since there is no specific maintenance time for the converter’s components, you can change your cat-con whenever required. However, when you experience the below symptoms, don’t be late to change or replace your vehicles CC.

  • Reduction of acceleration
  • Sulphur or foul smell
  • Excessive heat under the vehicle
  • Drop-in gas mileage
  • Noises from the exhaust pipe

What is the Purpose of Substrate?

Most catalytic converter’s inner shells are made of substrate material. 2 types of substrate materials are available: Monolithic and Pelletized substrate.

Thousands of ceramic pellets are used to manufacture pelletized substrate that converts toxic gases into water and CO2.
In contrast, a honeycomb-style catalytic converter uses a monolithic substrate. Its functionality is also similar to its counterpart pelletized substrate.

Why does my aftermarket cat-con go red hot when driving the car?

When fuel directly get introduced to the system, your catalytic converter will go red hot.

Although it will not damage the converter, this is not good at all for the fuel system. Therefore, if you experience a red hot problem in your converter, immediately get it checked by a mechanic.

Bottom Line

Now you know that the best aftermarket catalytic converter is efficient enough to eliminate the emission of harmful gases from the engine exhaust. So if you want to avoid legal actions being taken against you, install a cat-con in your vehicle without making it late.

Improve your vehicle performance and save the planet from harmful gases by installing an aftermarket CC in your vehicle. Hopefully, you now have every piece of information related to this unit and buying one unit will never be a challenging task for you. It is significantly essential to buy the best-suited item for your car. With little effort and time, you can get the required aftermarket cat-con easily.

So, sit back and make a precise decision.

Stay Safe!