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10 Best catalytic converter cleaners of 2025

Save up to 11% off
  • Best Choice

    1

    Cataclean Fuel & Exhaust System Cleaner – Pass Emissions Tests – Clear Check Engine Lights – Restores Catalytic Converters, DPF Filters and Cleans Fuel Systems, 16oz - Pack of 2 (120019)
    Cataclean

    Cataclean Fuel & Exhaust System Cleaner – Pass Emissions Tests – Clear Check Engine Lights – Restores Catalytic Converters, DPF Filters and Cleans Fuel Systems, 16oz - Pack of 2 (120019)

    9.8
    Exceptional
    Our Rating
  • Powerful technology We scan thousands of products and stores, analyzing reviews to find what matters most to users like you
    Careful review Our team ensures quality, value, and fit based on real user feedback
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    • Thousands of users trust our site daily
    • Based on millions of stores and reviews
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  • Value for Money

    2

    DURA LUBE 2 Pack Severe Catalytic and Exhaust Treatment Cleaner Fuel Additive, 16 fl. Oz, 2-Pack Combo Pack
    DURA LUBE

    DURA LUBE 2 Pack Severe Catalytic and Exhaust Treatment Cleaner Fuel Additive, 16 fl. Oz, 2-Pack Combo Pack

    10% Off
    • installation:Add to vehicle anytime
    • oem part number:HL-40240-02
    • vehicle fit:Universal fit
    • material:N/A
    • design:N/A
    9.7
    Exceptional

  • 3

    Liqui Moly Catalytic System Clean 300 ml 7110. Cleans The Injection System and The Combustion Chamber.
    Liqui Moly

    Liqui Moly Catalytic System Clean 300 ml 7110. Cleans The Injection System and The Combustion Chamber.

    11% Off
    9.5
    Excellent

  • 4

    2X Cans Catalytic Converter Cleaner, Oxygen sensor cleaner, pass emissions, SMOG, fuel additive, combustion chamber cleaner
    MotorPower Care

    2X Cans Catalytic Converter Cleaner, Oxygen sensor cleaner, pass emissions, SMOG, fuel additive, combustion chamber cleaner

    • Application Method:No disassembly, easy use
    • Performance Improvement:Fix P0420 & P0430
    • Cleaner Function:Clean catalytic converter
    • Fuel Economy:N/A
    • Compatibility:N/A
    9.4
    Excellent

  • 5

    2PCS Catalytic Converter Cleaner kit,Boost Up Catalytic Converter Cleaner Auto Parts Engine,Fuel and Exhaust Pipe Cleaners,Fuel System Treatment Oil for Gas and Diesel Car
    Generic

    2PCS Catalytic Converter Cleaner kit,Boost Up Catalytic Converter Cleaner Auto Parts Engine,Fuel and Exhaust Pipe Cleaners,Fuel System Treatment Oil for Gas and Diesel Car

    9.3
    Excellent
  • See Today’s Deals & Prices

  • 6

    2Pcs Catalytic Converter Cleaner, Auto Parts Engine Cleaner, Fuel and Exhaust System Cleaners Exhaust Pipe Carbon Deposit Cleaning for Gas and Diesel Car
    Generic

    2Pcs Catalytic Converter Cleaner, Auto Parts Engine Cleaner, Fuel and Exhaust System Cleaners Exhaust Pipe Carbon Deposit Cleaning for Gas and Diesel Car

    9.1
    Excellent

  • 7

    2 Pcs 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
    Generic

    2 Pcs 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

    8.9
    Very Good

  • 8

    Catalytic Converter Cleaner Pass Emissions Test Cleans Catalyst, Oxygen sensor and combustion chamber cleaner, fuel additive
    MotorPower Care

    Catalytic Converter Cleaner Pass Emissions Test Cleans Catalyst, Oxygen sensor and combustion chamber cleaner, fuel additive

    8.8
    Very Good
    Our Rating

  • 9

    BIXMK 2pcs 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
    BIXMK

    BIXMK 2pcs 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

    • Application Method:Pour in fuel tank
    • Performance Improvement:Improves vehicle performance
    • Cleaner Function:Reduces carbon build-up
    • Fuel Economy:Improved fuel efficiency
    • Compatibility:Gasoline and hybrid vehicles
    8.7
    Very Good

  • 10

    3 Pcs 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
    Generic

    3 Pcs 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

    8.5
    Good