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10 Best catalytic converter cleaners of 2026

Save up to 30% off
  • Best Choice

    1

    Liqui Moly Catalytic System Clean 300 ml 7110. Cleans The Injection System and The Combustion Chamber.
    Liqui Moly
    9.7
    Exceptional

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

    28% Off
    • Part Number:7110
    • Application:Gasoline engines with catalytic converter
    • Product Type:Catalytic system cleaner
    • Volume:300 ml
    • Cleans:Injection system and combustion chamber
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  • Value for Money

    2

    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
    MotorPower Care
    9.6
    Exceptional

    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

  • 3

    Cataclean Fuel & Exhaust System Cleaner for Gasoline Engines, 16 oz, 2 Pack
    Cataclean
    9.3
    Excellent

    Cataclean Fuel & Exhaust System Cleaner for Gasoline Engines, 16 oz, 2 Pack

  • 4

    Cataclean Fuel & Exhaust System Cleaner for Gasoline Engines, 16 oz
    Cataclean
    9.0
    Excellent

    Cataclean Fuel & Exhaust System Cleaner for Gasoline Engines, 16 oz

  • 5

    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
    8.9
    Very Good

    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

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  • 6

    Dura Lube Severe Catalytic and Exhaust Treatment Cleaner Fuel Additive, 16 fl. oz., (PN: HL-402409 PDQ3)
    DURA LUBE
    8.8
    Very Good

    Dura Lube Severe Catalytic and Exhaust Treatment Cleaner Fuel Additive, 16 fl. oz., (PN: HL-402409 PDQ3)

    • product dimensions: 2.62 x 2.62 x 9.12 inches
    • recommended uses for product: Engines
    • package information: Bottle
    • item weight: 1 pounds
    • special features: EMISSIONS

  • 7

    Cataclean (120007-2PK) Fuel and Exhaust System Cleaner - 16 fl. oz., (Pack of 2)
    Cataclean
    8.7
    Very Good

    Cataclean (120007-2PK) Fuel and Exhaust System Cleaner - 16 fl. oz., (Pack of 2)

    • is discontinued by manufacturer:‎No
    • product dimensions:‎9 x 6 x 6 inches
    • manufacturer part number:‎120007-2PK
    • item weight:‎1.95 pounds
    • customer reviews:4.3 4.3 out of 5 stars 1,004 ratings 4.3 out of 5 stars

  • 8

    Rislone 4720 Cat Complete Fuel, Exhaust, Emissions System Cleaner, 1-Pack
    Rislone
    8.6
    Very Good

    Rislone 4720 Cat Complete Fuel, Exhaust, Emissions System Cleaner, 1-Pack

    30% Off

  • 9

    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) (2pcs)
    Vizela
    8.3
    Good

    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) (2pcs)

    10% Off

  • 10

    Dura Lube Severe Catalytic and Exhaust Treatment Cleaner Fuel Additive | 16 Fl oz, 2-Pack
    DURA LUBE
    8.2
    Good

    Dura Lube Severe Catalytic and Exhaust Treatment Cleaner Fuel Additive | 16 Fl oz, 2-Pack

    • is discontinued by manufacturer:N/A
    • product dimensions:N/A
    • manufacturer part number: HL-40240-02
    • item weight:N/A
    • customer reviews:4.1 4.1 out of 5 stars 165 ratings 4.1 out of 5 stars