--- title: "engine catalytic converter cleaner — Niche Verdict: Worth a look (58/100) | Amazon United States - Flapen" canonical_url: "https://flapen.com/amazon/research/us/automotive/engine-catalytic-converter-cleaner" last_updated: "2026-07-10T03:43:03.887Z" locale: en meta: description: "engine catalytic converter cleaner shows demand growing >1,000%, but a small market ($21K/yr) keeps it on the watch list." "og:description": "engine catalytic converter cleaner shows demand growing >1,000%, but a small market ($21K/yr) keeps it on the watch list." "og:title": "engine catalytic converter cleaner — Niche Verdict: Worth a look (58/100) | Amazon United States - Flapen" --- Back to Flapen home # **engine catalytic converter cleaner** **Worth a look****58/100 ** engine catalytic converter cleaner shows demand growing >1,000%, but a small market ($21K/yr) keeps it on the watch list. **Market/yr** **$21K** **Growth (1y)** **>1,000%** **Products** **21** **Brands** **17** was 7 a year ago **Sellers** **51** **Price range** **$10.85–$46.47** **Returns** **0.5%** **Rating** **4.1★** **Worth a look** Scored 58/100 across market size, growth, competition, quality gap, and returns. Market sizeGrowthCompetitionQuality gapReturns Market size **1** ×0.30 Growth **100** ×0.30 Competition **53** ×0.20 Quality gap **77** ×0.10 Returns **96** ×0.10 ## **Demand** Weekly Amazon search volume, last 35 weeks — >1,000% year over year. 3K2KBlack Friday '25Spike '26Nov '25Dec '25Jan '26Feb '26Mar '26May '26Jun '26 ## **Competition** - Ciirvoe14% - hepanio13% - Vizela11% - Clussbin11% - stray poet10% - BIXMK7% - Other (11 brands)34% The top 5 products take 55% of clicks — established leaders, but buyers still shop beyond them. 17 brands and 51 sellers compete here. **Brands** **17 **▲rising was 7 a year ago **Sellers** **51** **Top 5 brand share** **58%** #ProductBrandPriceRatingReviewsClick shareTrend 1 ![hepanio 3Pcs Catalytic Converter Cleaner Catalytic Converter Cleaner Kit Auto Parts Engine Exhaust System Pipe Carbon Removal Cleaner Treatment Additive Oil Fuel System Treatment Oil Additive](https://m.media-amazon.com/images/I/51t34lF5YvL.jpg) [**hepanio 3Pcs Catalytic Converter Cleaner Catalytic Converter Cleaner Kit Auto Parts Engine Exhaust System Pipe Carbon Removal Cleaner Treatment Additive Oil Fuel System Treatment Oil Additive**](https://www.amazon.com/dp/B0FPCLXY3K) hepanio$13.904.2★25413%▼falling 2 ![Ciirvoe 3Pcs Catalytic Converter Cleaner Kit Boost Up Catalytic Convertor Cleaner Exhaust System Pipe Carbon Removal Cleaner Treatment Additive Oil Fuel System Treatment Oil Additive](https://m.media-amazon.com/images/I/517Kokx4BDL.jpg) [**Ciirvoe 3Pcs Catalytic Converter Cleaner Kit Boost Up Catalytic Convertor Cleaner Exhaust System Pipe Carbon Removal Cleaner Treatment Additive Oil Fuel System Treatment Oil Additive**](https://www.amazon.com/dp/B0GGR62D24) Ciirvoe$12.154.2★10312%▲rising 3 ![Catalytic Convertor Cleaner 4Pcs Clussbin Catalytic Converter Cleaner Kit Fuel System Treatment Oil Additive](https://m.media-amazon.com/images/I/51xhkrtwEpL.jpg) [**Catalytic Convertor Cleaner 4Pcs Clussbin Catalytic Converter Cleaner Kit Fuel System Treatment Oil Additive**](https://www.amazon.com/dp/B0G4C626HK) Clussbin$17.130.0★011%▲rising 4 ![stray poet 3Pcs Catalytic Converter Cleaner Catalytic Converter Cleaner Kit Auto Parts Engine Exhaust System Pipe Carbon Removal Cleaner Treatment Additive Oil Fuel System Treatment Oil Additive](https://m.media-amazon.com/images/I/51t34lF5YvL.jpg) [**stray poet 3Pcs Catalytic Converter Cleaner Catalytic Converter Cleaner Kit Auto Parts Engine Exhaust System Pipe Carbon Removal Cleaner Treatment Additive Oil Fuel System Treatment Oil Additive**](https://www.amazon.com/dp/B0FJY1TD9M) stray poet$16.194.1★40710%▼falling 5 ![Catalytic Converter Cleaner Auto Parts Engine Exhaust System Pipe Carbon Removal Cleaner Treatment Additive Oil Fuel System Treatment Oil Additive for Gas and Diesel Car(120 ml) (3pcs)](https://m.media-amazon.com/images/I/41K9SPz-+vL.jpg) [**Catalytic Converter Cleaner Auto Parts Engine Exhaust System Pipe Carbon Removal Cleaner Treatment Additive Oil Fuel System Treatment Oil Additive for Gas and Diesel Car(120 ml) (3pcs)**](https://www.amazon.com/dp/B0FRNLQCMS) Vizela$13.724.2★2789%▲rising 6 ![BIXMK 2pcs Catalytic Converter Cleaner Auto Parts Engine Boost Up Catalytic Convertor Cleaner Exhaust System Pipe Carbon Removal Cleaner Fuel System Treatment Oil Additive for Gas and Diesel Car](https://m.media-amazon.com/images/I/51TGDcShqSL.jpg) [**BIXMK 2pcs Catalytic Converter Cleaner Auto Parts Engine Boost Up Catalytic Convertor Cleaner Exhaust System Pipe Carbon Removal Cleaner Fuel System Treatment Oil Additive for Gas and Diesel Car**](https://www.amazon.com/dp/B0DFMB6K3X) BIXMK$12.414.0★3407%▲rising 7 ![Liqui Moly Catalytic System Clean 300 ml 7110. Cleans The Injection System and The Combustion Chamber.](https://m.media-amazon.com/images/I/41cEqZoV8jL.jpg) [**Liqui Moly Catalytic System Clean 300 ml 7110. Cleans The Injection System and The Combustion Chamber.**](https://www.amazon.com/dp/B07Z54MBQ3) Liqui Moly$18.254.4★3,7366%▲rising 8 ![3PCS Catalytic Converter Cleaner Auto Parts Engine Exhaust System Pipe Carbon Removal Cleaner Treatment Additive Oil Fuel System Treatment Oil for Gas and Diesel Car](https://m.media-amazon.com/images/I/415Q+v7wxqL.jpg) [**3PCS Catalytic Converter Cleaner Auto Parts Engine Exhaust System Pipe Carbon Removal Cleaner Treatment Additive Oil Fuel System Treatment Oil for Gas and Diesel Car**](https://www.amazon.com/dp/B0FK9JYPLK) Omaky$12.633.7★514%▲rising 9 ![ClearLover Auto Parts Engine Boost Up Cleaner Catalytic Converter Cleaner Fuel System Treatment Additive for Gasoline and Diesel Car (6Pcs)](https://m.media-amazon.com/images/I/51l0XHqZs4L.jpg) [**ClearLover Auto Parts Engine Boost Up Cleaner Catalytic Converter Cleaner Fuel System Treatment Additive for Gasoline and Diesel Car (6Pcs)**](https://www.amazon.com/dp/B09CVCWLZT) ClearLover$36.234.0★1204%▲rising 10 ![Timeno 3Pcs Catalytic Converter Cleaner Boost Up Catalytic Convertor Cleaner Pipe Carbon Removal Cleaner Treatment Additive Oil Fuel System Treatment Oil Additive for Gas and Diesel Car](https://m.media-amazon.com/images/I/51tNfmx3XQL.jpg) [**Timeno 3Pcs Catalytic Converter Cleaner Boost Up Catalytic Convertor Cleaner Pipe Carbon Removal Cleaner Treatment Additive Oil Fuel System Treatment Oil Additive for Gas and Diesel Car**](https://www.amazon.com/dp/B0FP9DFTH2) Timeno$13.794.3★2434%▼falling 11 ![Charunee 4 Pack Catalytic Converter Cleaner | Gas & Diesel Fuel Additive](https://m.media-amazon.com/images/I/51+UGLyVVUL.jpg) [**Charunee 4 Pack Catalytic Converter Cleaner | Gas & Diesel Fuel Additive**](https://www.amazon.com/dp/B0FR93TS33) Charunee$17.234.1★263%▲rising 12 ![MotorPower Care Catalytic Converter Cleaner 2-Pack Pass Smog & Emissions Test Fix P0420/P0430 Check Engine Light | O2 Sensor & EGR Cleaner | Fuel Additive 8.45 fl oz Each](https://m.media-amazon.com/images/I/51sGHyaOPwL.jpg) [**MotorPower Care Catalytic Converter Cleaner 2-Pack Pass Smog & Emissions Test Fix P0420/P0430 Check Engine Light | O2 Sensor & EGR Cleaner | Fuel Additive 8.45 fl oz Each**](https://www.amazon.com/dp/B0CDFTF8NK) MotorPower Care$29.974.2★8892%—flat 13 ![ClearLover Auto Parts Engine Boost Up Cleaner Catalytic Converter Cleaner Fuel System Treatment Additive for Gasoline and Diesel Car (3Pcs)](https://m.media-amazon.com/images/I/41-2vXBAbYL.jpg) [**ClearLover Auto Parts Engine Boost Up Cleaner Catalytic Converter Cleaner Fuel System Treatment Additive for Gasoline and Diesel Car (3Pcs)**](https://www.amazon.com/dp/B09CVCNHQR) ClearLover$21.203.8★2442%▲rising 14 ![Ciirvoe 6Pcs Catalytic Converter Cleaner Kit Boost Up Catalytic Convertor Cleaner Exhaust System Pipe Carbon Removal Cleaner Treatment Additive Oil Fuel System Treatment Oil Additive](https://m.media-amazon.com/images/I/51HuWSECxoL.jpg) [**Ciirvoe 6Pcs Catalytic Converter Cleaner Kit Boost Up Catalytic Convertor Cleaner Exhaust System Pipe Carbon Removal Cleaner Treatment Additive Oil Fuel System Treatment Oil Additive**](https://www.amazon.com/dp/B0GTMR4DKG) Ciirvoe$18.154.2★1032%▲rising 15 ![2PCS Catalytic Converter Cleaner Kit Auto Parts Engine Cleaner Exhaust System Pipe Carbon Removal Cleaner Treatment Additive Oil Fuel System Treatment Oil for Gas and Diesel Car](https://m.media-amazon.com/images/I/41bm93stveL.jpg) [**2PCS Catalytic Converter Cleaner Kit Auto Parts Engine Cleaner Exhaust System Pipe Carbon Removal Cleaner Treatment Additive Oil Fuel System Treatment Oil for Gas and Diesel Car**](https://www.amazon.com/dp/B0F5QGPLLN) Generic$12.644.0★942%▼falling **~~Showing 15 of 21 — show all ~~** ## **Product shelf** All 21 tracked products in this niche. Top sellersNewestTrending [![hepanio 3Pcs Catalytic Converter Cleaner Catalytic Converter Cleaner Kit Auto Parts Engine Exhaust System Pipe Carbon Removal Cleaner Treatment Additive Oil Fuel System Treatment Oil Additive](https://m.media-amazon.com/images/I/51t34lF5YvL.jpg)**hepanio 3Pcs Catalytic Converter Cleaner Catalytic Converter Cleaner Kit Auto Parts Engine Exhaust System Pipe Carbon Removal Cleaner Treatment Additive Oil Fuel System Treatment Oil Additive** hepanio**$13.90**4.2★254 reviews](https://www.amazon.com/dp/B0FPCLXY3K) [![Ciirvoe 3Pcs Catalytic Converter Cleaner Kit Boost Up Catalytic Convertor Cleaner Exhaust System Pipe Carbon Removal Cleaner Treatment Additive Oil Fuel System Treatment Oil Additive](https://m.media-amazon.com/images/I/517Kokx4BDL.jpg)**Ciirvoe 3Pcs Catalytic Converter Cleaner Kit Boost Up Catalytic Convertor Cleaner Exhaust System Pipe Carbon Removal Cleaner Treatment Additive Oil Fuel System Treatment Oil Additive** Ciirvoe**$12.15**4.2★103 reviews](https://www.amazon.com/dp/B0GGR62D24) [![Catalytic Convertor Cleaner 4Pcs Clussbin Catalytic Converter Cleaner Kit Fuel System Treatment Oil Additive](https://m.media-amazon.com/images/I/51xhkrtwEpL.jpg)**Catalytic Convertor Cleaner 4Pcs Clussbin Catalytic Converter Cleaner Kit Fuel System Treatment Oil Additive** Clussbin**$17.13**0.0★0 reviews](https://www.amazon.com/dp/B0G4C626HK) [![stray poet 3Pcs Catalytic Converter Cleaner Catalytic Converter Cleaner Kit Auto Parts Engine Exhaust System Pipe Carbon Removal Cleaner Treatment Additive Oil Fuel System Treatment Oil Additive](https://m.media-amazon.com/images/I/51t34lF5YvL.jpg)**stray poet 3Pcs Catalytic Converter Cleaner Catalytic Converter Cleaner Kit Auto Parts Engine Exhaust System Pipe Carbon Removal Cleaner Treatment Additive Oil Fuel System Treatment Oil Additive** stray poet**$16.19**4.1★407 reviews](https://www.amazon.com/dp/B0FJY1TD9M) [![Catalytic Converter Cleaner Auto Parts Engine Exhaust System Pipe Carbon Removal Cleaner Treatment Additive Oil Fuel System Treatment Oil Additive for Gas and Diesel Car(120 ml) (3pcs)](https://m.media-amazon.com/images/I/41K9SPz-+vL.jpg)**Catalytic Converter Cleaner Auto Parts Engine Exhaust System Pipe Carbon Removal Cleaner Treatment Additive Oil Fuel System Treatment Oil Additive for Gas and Diesel Car(120 ml) (3pcs)** Vizela**$13.72**4.2★278 reviews](https://www.amazon.com/dp/B0FRNLQCMS) [![BIXMK 2pcs Catalytic Converter Cleaner Auto Parts Engine Boost Up Catalytic Convertor Cleaner Exhaust System Pipe Carbon Removal Cleaner Fuel System Treatment Oil Additive for Gas and Diesel Car](https://m.media-amazon.com/images/I/51TGDcShqSL.jpg)**BIXMK 2pcs Catalytic Converter Cleaner Auto Parts Engine Boost Up Catalytic Convertor Cleaner Exhaust System Pipe Carbon Removal Cleaner Fuel System Treatment Oil Additive for Gas and Diesel Car** BIXMK**$12.41**4.0★340 reviews](https://www.amazon.com/dp/B0DFMB6K3X) [![Liqui Moly Catalytic System Clean 300 ml 7110. Cleans The Injection System and The Combustion Chamber.](https://m.media-amazon.com/images/I/41cEqZoV8jL.jpg)**Liqui Moly Catalytic System Clean 300 ml 7110. Cleans The Injection System and The Combustion Chamber.** Liqui Moly**$18.25**4.4★3,736 reviews](https://www.amazon.com/dp/B07Z54MBQ3) [![3PCS Catalytic Converter Cleaner Auto Parts Engine Exhaust System Pipe Carbon Removal Cleaner Treatment Additive Oil Fuel System Treatment Oil for Gas and Diesel Car](https://m.media-amazon.com/images/I/415Q+v7wxqL.jpg)**3PCS Catalytic Converter Cleaner Auto Parts Engine Exhaust System Pipe Carbon Removal Cleaner Treatment Additive Oil Fuel System Treatment Oil for Gas and Diesel Car** Omaky**$12.63**3.7★51 reviews](https://www.amazon.com/dp/B0FK9JYPLK) ## **Reviews** What buyers praise and complain about, mined from review topics. ### **What buyers love ** **Efficiency**28% *“Effective”* **Quality-Overall**17% *“Great produce”* **Ease Of Use**9% *“Ease of use”* **Value For Money**9% *“Excellent value”* **Advertised Vs Actual Product**9% *“Just as advertised”* **Ease Of Cleaning**7% *“Clean”* **Fuel Efficiency**5% *“It's done wonders for my fuel system”* **Functionality-Overall**2% *“Try it, it may do the job”* **Instructions/User Manual/Troubleshooting**2% *“following the easy instructions”* **Maintenance And Repair**1% *“simple enough for routine maintenance use”* ### **What buyers complain about ** **Functionality-Overall**43% *“It did not work as described”* **Advertised Vs Actual Product**6% *“Didn't work as advertised”* **Value For Money**4% *“the price was WAY too high”* **Instructions/User Manual/Troubleshooting**4% *“Lack of instructions”* **Compatibility-Overall**4% *“It didnt work for my Escalade or Camry”* **Quality-Overall**3% *“Their product is no good”* **Leak-Proof**3% *“all the chemical leaked out”* **Sensor**3% *“the sensor 2 code went away”* **Maintenance And Repair**3% *“won't fix”* **Size-Overall**3% *“can't do much with that being so small”* #### **Top return reasons**- Leak-Proof20% - Functionality-Overall20% - Advertised Vs Actual Product12% - Compatibility-Overall10% - Value For Money9% - Defective Material/Parts6% - Size-Overall4% - Instructions/User Manual/Troubleshooting3% - Maintenance And Repair1% - Smell1%