Best Catalytic Converters 2025

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Last Updated - 09/06/2025

Best Choice

01

Generic

Instant Practical Car Exhaust Gas Cleaner, Catalytic Converter Cleaner, Boost Up Catalytic Converter Cleaner (3 Pieces)

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9.8

Exceptional

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

[Versatile Application] Suitable for various vehicle conditions such as low power, excessive exhaust emissions, warning lights, restless idle and increased fuel consumption. In addition to cleaning the catalytic converter, it also effectively cleans other components such as oxygen sensors, injectors and cylinder heads. Our product is compatible with petrol, diesel, hybrid and flex fuel vehicles without changing the fuel composition.
[Engine Protection] By promoting proper fuel and exhaust flow, our cleaner ensures that your engine runs cleaner, quieter and better. This not only improves performance, but also reduces maintenance costs in the long run. Protect your valuable engine with our proven solution.
Wide range of applications: Whether you own a sedan, SUV, truck or crossover, our practical instant car exhaust cleaner is perfect for all vehicle types. Experience the benefits of improved engine performance and efficiency on different types of fuel. Trust our reliable solution to solve vehicle problems and improve your driving experience.
Improved engine performance: Our instant practical car exhaust cleaner is designed to improve the overall performance of your vehicle, including reducing power loss, hesitation, unstable idle, starting difficulties and decreased fuel consumption. Say goodbye to driving performance problems and experience a quieter ride.
Effortless cleaning solution: With our practical cleaner, you can easily clean your catalytic converter thoroughly without having to disassemble it. Simply pour it into your fuel tank and watch the dreaded "Check Engine" light stop flashing as you enjoy better engine performance. So you can easily keep your engine in its best shape.

19,99 €
02

behound

behound Instaboost™ Car Converter Exhaust Cleaning Liquid, Catalytic Converter Cleaner – Instant Car Exhaust Mobile Phone Cleaner, Fuel and Exhaust System Cleaner for Car, 120 ml (2 Pieces)

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9.7

Exceptional

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Wide application scope: our catalytic converter cleaner is safe for use in gasoline, diesel, hybrid, and flex-fuel vehicles. No need for fuel changes.
Lower emission levels: Experience a significant reduction of up to 50 percent in total hydrocarbon emissions. Our cleaner effectively cleans the fuel injection system and cylinders, resulting in enhanced overall performance.
Fuel consumption reduction and odour elimination: our cleaner not only cuts down on fuel consumption but also eliminates unpleasant odours that accumulate in your car over time.
Engine protection: Proper fuel and exhaust flow provided by our cleaner ensure your engine runs cleaner, smoother, and better. This not only improves performance but also reduces maintenance costs.
Efficient catalytic converter cleaning: our catalytic converter cleaner offers a deep cleaning solution without the need for removal.

19,36 €
03

Generic

Catalytic Converter Cleaner Agent for Vehicle, Car Catalytic Converter Cleaner Diesel for Engine Catalytic Converter Booster, Cat Cleaner Petrol, Catalytic Converter Cleaner Engine Booster Cleaner (4

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9.6

Exceptional

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

【Easy cleaning】: Simply pour into your fuel tank. Clean and protect catalyst material. Use one bottle per tank for the most effective treatment that can be added directly to the fuel tank when refueling. Compatible with all petrol and hybrid vehicles.
Fuel consumption, bad odour: while reducing fuel consumption, it will also get rid of the Icky odour developed by your car overtime. Catalytic converter cleaner, catalytic converter cleaner, catalytic converter cleaner, catalytic converter cleaner, catalytic converter cleaner, catalytic converter cleaner
Diesel catalytic converter cleaner: help clean the fuel injection system as well as the cylinders, improve overall performance.
Catalytic converter cleaner petrol: High mile fuel injector is specially formulated to remove carbon deposits from engines with more than 75,000 miles. Safe for petrol, diesel, hybrid and flex fuel vehicles; does not change fuel
Boost Up Catalytic Converter Cleaner: Reduces carbon build-up in catalytic converters, oxygen sensors, injectors and cylinder heads, resulting in improved fuel efficiency. Improves overall vehicle performance - including drivability issues such as power reduction, hesitation, rough idle, hard start-up and lost fuel economy

18,97 €
Value for Money

04

Generisch

Catalytic Converter Cleaner Petrol, Car Catalytic Converter Cleaner, Instant Practical Car Exhaust Cleaner, Boost Up Catalyst Cleaner, Engine Turbocharger Cleaner, Catalytic Converter Cleaner Engine

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9.5

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Protection against expensive repairs: The catalytic converter cleaner petrol protects the catalytic converter and other important vehicle components such as oxygen sensors and injectors from deposits that can lead to expensive repairs. By cleaning these parts, you reduce maintenance and ensure smooth operation.
Optimal cleaning for all vehicle types: the catalytic converter cleaner petrol is suitable for all vehicle types, including petrol, diesel, hybrid and flex fuel vehicles. This cleaner ensures thorough and effective cleaning of the entire exhaust system, reducing emissions and improving the overall performance of the vehicle.
IMPROVED PERFORMANCE AND FUEL EFFICIENCY The catalyst cleaner gasoline removes deposits and impurities from the catalyst and exhaust system, resulting in higher fuel efficiency and lowers fuel consumption. At the same time, the engine performance is improved, which allows you to optimise driving performance.
Easy to use, instant results: the petrol catalytic converter cleaner offers a quick and effective solution for cleaning the catalytic converter without having to disassemble it. Simply add the catalytic converter cleaner petrol to the fuel tank and immediately experience improved engine performance and a reduction in exhaust emissions.
EXTENDS ENGINE LIFE - The car catalytic converter cleaner helps loosen deposits throughout the exhaust system, protecting the turbocharger and other important engine components from contamination. The catalytic converter cleaner petrol extends the life of your engine while improving its efficiency.

9,99 €
05

FLLUOUZH

3 Pcs Instant Car Exhaust Mobile Phone Cleaner Catalytic Converter Cleaner Fuel and Exhaust System Cleaner Boost Up Engine Treatment Auto Parts Engine Boost Up Cleaner

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9.4

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Versatile application: suitable for gasoline, diesel, hybrid, and flex-fuel vehicles, the cleaner does not alter fuel composition. It effectively cleans other parts, including the oxygen sensor, fuel injectors, and cylinder heads, but is not suitable for 2-stroke or oil/gas mix engines
Reduced Emissions and Fuel Consumption: The cleaner helps lower hydrocarbon emissions by up to 50% and improves fuel efficiency by reducing carbon buildup in the catalytic converter and other engine components
Odor Elimination and Engine Protection: While enhancing performance, the cleaner also removes bad odors accumulated over time, helping maintain a cleaner and smoother-running engine, ultimately cutting down on maintenance costs
Enhanced Engine Performance: The catalytic converter cleaner significantly improves overall vehicle performance by addressing drivability issues such as power reduction, hesitation, rough idle, hard starts, and decreased fuel economy
Easy and Effective Cleaning: This cleaner allows for deep cleaning of the catalytic converter without the need for disassembly. Simply pour it into the fuel tank to stop the "Check Engine" light and enhance engine performance effortlessly

16,78 €
06

GZWY

Catalyst Cleaner Petrol, Catalytic Converter Cleaner, Car Catalytic Converter Cleaner for Engine Catalytic Converter Booster, for Petrol, Diesel, Hybrid Catalytic Converter Cleaner Engine Booster

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9.2

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Scope of application: catalyst cleaner. Safe for petrol, diesel, hybrid and flex fuel vehicles, without fuel change, not for 2-stroke or oil/gas mixed engines.
Reduce Fuel Consumption & Bad Smell While reducing fuel consumption, it also eliminates the unpleasant odor that accumulates in your car over time. The right fuel and the right exhaust fumes ensure that the engine runs cleaner, quieter and better, which also reduces maintenance costs.
Protect the engine: the cleaner comes into contact with the carbon deposits and impurities when flowing through the converter and effectively dissolves them. The active components chemically decompose these deposits so they can be removed and dissolved from the inner surfaces of the converter.
ENERGY SAVING & EMISSION REDUCTION Catalytic converter cleaner reduces total hydrocarbon emissions by up to 50%, reduces carbon deposits in catalytic converters, oxygen sensors, injectors and cylinder heads, improves fuel efficiency and eliminates the unpleasant odor your car has developed over time while reducing fuel consumption.
Catalytic Converter Cleaner: Clean your converter thoroughly with the catalyst cleaner without disassembling it! Stop the dreaded engine maintenance light flashing on your display and achieve better engine performance. Makes life easier.

12,99 €
07

Doukesh

Pack of 2 Catalytic Converter Cleaner Petrol, Car Catalytic Converter Cleaner, Diesel Catalytic Converter Cleaner, Suitable for Petrol, Diesel, Hybrid Catalytic Converter Cleaner, Engine Turbocharger

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9.1

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Strong cleaning The catalytic exhaust cleaner has strong cleaning ability, which can reduce total hydrocarbon emissions by 50%, reduce carbon deposits in catalysts, oxygen sensors, injectors and cylinder heads, quickly decompose and remove carbon deposits and impurities in the exhaust system, and improve engine performance
Protection of the motor: the cleaner comes into contact with carbon deposits and impurities when driving through the converter and effectively dissolves them. The active ingredients chemically decompose these sediments to remove and dissolve them from the inner surface of the converter, ensuring the environmental compatibility of the vehicle
Large capacity design: our package contains 2 pieces 120ml capacity exhaust catalyte cleaner, which can meet your long-term use requirements and ensure that your vehicle's exhaust system remains clean and efficient at all times.
Easy to Use Use catalyst cleaner to thoroughly clean the converter without disassembly, so it can be used easily anytime, anywhere. The catalytic exhaust cleaner is suitable for various petrol vehicles and maintains the health of your car.
ECO-FRIENDLY FORMULA The catalytic exhaust cleaner adopts an environmentally friendly formula that contains no harmful substances and is safe to use. Effective reduction of pollutant emissions in the exhaust gas to achieve better engine performance. Make life easier

9,99 €
08

95

95 Catalytic Converter Cleaner 120 ml X2 Car Catalytic Converter Cleaner for Engine Catalytic Converter Booster, for Petrol, Diesel, Hybrid Catalytic Converter Cleaner Engine Booster Cleaner

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9.0

Excellent

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

✿ This is an absolute money saver! Thanks to lower maintenance and fuel costs.
✿ Lower emissions: can reduce your total hydrocarbon emissions by up to 50 percent.
✿ If you ever notice that your fuel consumption is noticeably decreasing or a rotten egg smell emanates from your engine, you need to clean the catalytic converter immediately! Safe for petrol, diesel, hybrid and flex-fuel vehicles; does not change fuel. Not suitable for 2-stroke or oil/gas mixed engines.
✿ BETTER ENGINE PERFORMANCE: Clean the fuel injection system as well as the cylinders and improve overall performance.
Reduce fuel consumption and bad odour: while reducing fuel consumption, the unpleasant smell caused by overtime of your car is also eliminated.

9,62 €
09

Generisch

Catalytic Converter Cleaner Car Catalytic Converter Cleaner for Engine Catalytic Converter Booster, for Petrol, Diesel, Hybrid Catalytic Converter Cleaner Engine Booster Cleaner (3 Pieces)

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8.9

Very Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

[Use] catalyst detergent. Suitable for petrol, diesel, hybrid and flex fuel vehicles, no fuel change required, not suitable for two stroke or oil gas hybrid engines.
[Protect Motor] When the detergent flows through the converter, it comes into contact with carbon deposits and impurities and effectively dissolves them. The active ingredients decompose these deposits, removing and releasing them from the inner surfaces of the converter.
Reduce fuel consumption and odour: while reducing fuel consumption, the disgusting smell that occurs in the car over time is also eliminated. The right fuel and the right emissions ensure that the engines run cleaner, quieter and better, which also reduces maintenance costs.
Energy saving and emission reduction: catalyst cleaner can reduce total hydrocarbon emissions by up to 50%, reduce carbon deposits in the catalytic converter, oxygen sensor, fuel injector and cylinder head, improve fuel efficiency and eliminate the random emissions of your car odour that develops over time. Reduce fuel consumption.
Catalyst Cleaner: Use the catalyst cleaner to thoroughly clean your converter without disassembling it. Stop the dreaded engine maintenance light flashing on the display and achieve better engine performance. Make life easier.

12,99 €
10

Protec

OXICAT Catalytic Converter Cleaner,Turbo Cleaner.

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8.7

Very Good

Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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Main highlights

Suitable for all petrol, diesel and even hybrid powered engines.
Optimized engine performance.
Increases fuel efficiency
Ensures proper function of catalytic converter and lambda/oxygen sensor
Catalytic Converter Cleaner

16,49 €