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  • Coverage for accidental damage including drops, spills, and broken parts, as well as breakdowns (plans vary)
  • 24/7 support when you need it.
  • Quick, easy, and frustration-free claims.
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Only 11 left in stock - order soon.
$$120.56 () Includes selected options. Includes initial monthly payment and selected options. Details
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Ships from
Crimp Supply Inc
Ships from
Crimp Supply Inc
Returns
Non-returnable due to hazmat safety reasons
Non-returnable due to hazmat safety reasons
This item is non-returnable due to its composition that makes it regulated for transportation, but if the item arrives damaged or defective, you may request a refund or replacement.
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Returns
Non-returnable due to hazmat safety reasons
This item is non-returnable due to its composition that makes it regulated for transportation, but if the item arrives damaged or defective, you may request a refund or replacement.
Read full return policy
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We work hard to protect your security and privacy. Our payment security system encrypts your information during transmission. We don’t share your credit card details with third-party sellers, and we don’t sell your information to others. Learn more
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3 Year Auto Accessories Protection Plan

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  • No Additional Cost: You pay nothing for repairs – parts, labor, and shipping included.
  • Coverage: Plan starts on the date of purchase. Drops, spills and cracked screens due to normal use covered for portable products and power surges covered from day one. Malfunctions covered after the manufacturer's warranty.
  • Easy Claims Process: File a claim anytime online or by phone. Most claims approved within minutes. We will send you an e-gift card for the purchase price of your covered product. In some instances, we will replace or repair it.
  • Product Eligibility: Plan must be purchased with a product or within 30 days of the product purchase. Pre-existing conditions are not covered.
  • Terms & Details: More information about this protection plan is available within the “Product guides and documents” section. Simply click “User Guide” for more info. Terms & Conditions will be available in Your Orders on Amazon. Asurion will also email your plan confirmation with Terms & Conditions to the address associated with your Amazon account within 24 hours of purchase.
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Asurion Complete Protect: One plan covers all eligible past and future purchases on Amazon

from Asurion, LLC
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  • Buy a lot of stuff on Amazon? Tons of items eligible for coverage, from the latest tech like laptops, game consoles, and TVs, to major appliances, sporting goods, tools, toys, mattresses, personal care, furniture, and more.
  • Accidents happen. That’s why for your portable products we cover accidental damage from handling such as drops, spills and cracked screens. We also cover electrical and mechanical malfunctions, power surges, and wear and tear.
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  • No hidden fees. For just $16.99 a month + tax you’re covered for up to $5,000 in claims per 12-month period. *THIS PROGRAM IS MONTH-TO-MONTH AND WILL CONTINUE UNTIL CANCELED* Coverage for all products ends 30 days after the plan is canceled. Cancel any time.
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Rislone 4720 Cat Complete Fuel, Exhaust & Emissions System Cleaner, Check Engine Light Medic (4 Pack)

4.0 4.0 out of 5 stars 28 ratings
$120.56
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Purchase options and add-ons

  • Increase power, performance, mileage and save gas: Cleans by not only the entire emissions and exhaust system, but the fuel system as well. Works with gasoline, ethanol and hybrid vehicles.
  • Save on expensive fuel system and emission control repairs: Regular use every 5,000 miles tunes-up the fuel, emissions and exhaust systems keeping them clean and preventing the CEL light from returning.
  • Will not void manufacturer’s new vehicle warranty: Specifically designed and safe to use on vehicles which have oxygen sensors and catalytic converters. Exceeds EPA compliance performance criteria.
  • Works on all fuel injected, direct injected, carbureted, turbo, GTDI, Ecotec and EcoBoost engines.
  • Clean fuel and exhaust systems reduce excess exhaust hydrocarbon, CO and NOX emissions and saves gas.
› See more product details

Buy it with

Rislone 4720 Cat Complete Fuel, Exhaust & Emissions System Cleaner, Check Engine Light Medic (4 Pack)
$120.56
Get it May 9 - 13
Only 11 left in stock - order soon.
Ships from and sold by Crimp Supply Inc.
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$26.07 ($0.16/Fl Oz)
Get it as soon as Monday, May 13
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Ships from and sold by Amazon.com.
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Motorcraft FL-820-S Oil Filter
$12.16
Get it as soon as Sunday, May 12
In Stock
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From the manufacturer

Rislone 4720 Cat Complete Box with Bottle

Cat Complete Fuel, Exhaust & Emissions System Cleaner

CAT COMPLETE Fuel, Exhaust & Emissions System Cleaner has high-performing detergents and heavy duty cleaning solvents that effectively scrub and remove contaminants, soot, carbon build-up, and oily residue from the fuel injectors, combustion chambers, turbo, EGR, catalytic converters, oxygen sensors and the exhaust system. These along with other active chemical agents, react with the gases created in the combustion process to remove the remaining inorganic deposits. This process restores their function and with regular use maintains efficiency.

Turns off these OBD-II PID Codes

  • P0138 P0139
  • P0143 P0144 P0145 P0146
  • P0151 P0152 P0153 P0154 P0157 P0158 P0159
  • P0160 P0163 P0164 P0165 P0166
  • P0171 P0173 P0174 P0175
  • P0420 P0421 P0430 P0431

Features:

  • Turn Off Check Engine Light
  • Clear P0420 & Other OBD Codes
  • Cleans & Restores Catalytic Converter
  • Reduces Emissions & Saves Gas
CAT Complete Fuel, Exhaust & Emissions System Cleaner DPF Clean Diesel DPF, Exhaust & Emissions System Cleaner
CAT Complete Fuel, Exhaust & Emissions System Cleaner DPF Clean Diesel DPF, Exhaust & Emissions System Cleaner
Customer Reviews
3.9 out of 5 stars
809
4.5 out of 5 stars
53
Price $25.82 $22.74
Turn off Check Engine Light Best Best
Clear P0420 & Other OBD Codes Best
Clear P0420F & Other OBD Codes Best
Cleans & Restores Catalytic Converter Best
Cleans DPF Filter Best
Pass Emissions Smog Test Best Best
Deodorizes Smelly Exhaust Best
Extends DPF Generation Cycles Best
Restore Power & Performance Best Best
Dirty Valves or Combustion Chamber Best Best
Rislone History

Made in the USA

With over 100 years of experience under our belt, you can trust our revolutionary performance products will give your car a fighting chance at a long, healthy life.

Remember, your car is what it eats. Make it Rislone.

The Rislone Experience

Your car is what it eats. Make it Rislone.

Rislone, one of the original automotive chemical additives, was introduced to the world back in 1921. Over the years, our company rose to international popularity, becoming a go-to for many famous users, such as the U.S. Navy, not to mention professional race teams of almost every stripe. We have continued to evolve alongside the industry’s automotive technological changes in order to provide our customers with the best performance products out there.

Product Description

Fuel, Exhaust & Emissions, Systems Cleaner: CAT COMPLETE Fuel, Exhaust & Emissions System Cleaner has high-performing detergents and heavy duty cleaning solvents that effectively scrub and remove contaminants, soot, carbon build-up, and oily residue from the fuel injectors, combustion chambers, turbo, EGR, catalytic converters, oxygen sensors and the exhaust system. These along with other active chemical agents, react with the gases created in the combustion process to remove the remaining inorganic deposits. This process restores their function and with regular use maintains efficiency. As fuel is burned contaminating byproducts are created that get circulated throughout various vehicle components. The system is designed to be able to handle this process during most normal engine operation. However, the use of poor quality fuel, short driving distance, cold weather, improper maintenance, and component failure can greatly increase the amount of contamination and deposits created inside these systems. Such factors can cause increased exhaust emissions, reduced fuel economy, lost power & performance, drivability issues, engine overheating, hard starts, check engine light illumination and premature engine wear.

Product information

Technical Details

Additional Information

Warranty & Support

Amazon.com Return Policy:Amazon.com Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. You can find out more about the exceptions and conditions here.
Product Warranty: For warranty information about this product, please click here

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Rislone 4720 Cat Complete Fuel, Exhaust & Emissions System Cleaner, Check Engine Light Medic (4 Pack)

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What's in the box

  • (4) Rislone Cat Complete Fuel, Exhaust & Emissions System Cleaner

    • Product guides and documents

    User Guide (PDF)

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    Price$120.56$22.74$16.50$70.06-10% $44.95
    List: $49.94    		$10.19
    Delivery
    Get it May 9 - 13
    Get it May 9 - 13
    Get it as soon as Monday, May 13
    Get it as soon as Monday, May 13
    Get it as soon as Monday, May 13
    Get it as soon as Sunday, May 12
    Customer Ratings
    4.04.0 out of 5 stars28
    4.54.5 out of 5 stars53
    4.64.6 out of 5 stars5,898
    3.93.9 out of 5 stars809
    4.34.3 out of 5 stars2,334
    4.74.7 out of 5 stars4,577
    Easy to use
    4.2
    4.8
    4.8
    4.2
    4.5
    4.7
    Value for money
    3.1
    4.4
    4.4
    2.9
    3.7
    4.4
    Mileage
    3.1
    4.3
    4.3
    2.9
    3.6
    4.4
    Sold By
    Crimp Supply Inc
    Crimp Supply Inc
    R/A Hoerr Incorporated
    Amazon.com
    BoostProjects
    Amazon.com

    Looking for specific info?

    Customer reviews

    4 out of 5 stars
    4 out of 5
    28 global ratings

    Top reviews from the United States

    ahmad aburialeh
    5.0 out of 5 stars Works as advertised.made the engine run much smoother
    Reviewed in the United States on March 25, 2022
    Verified Purchase
    Excellent product.smoothed my car's engine in one treatment.
    Helpful
     Report
    Candy
    4.0 out of 5 stars Good
    Reviewed in the United States on August 10, 2022
    Verified Purchase
    Good
    Helpful
     Report
    Daniel Castillo
    1.0 out of 5 stars I want a refund my check engine light is still on, it did not clean my catalytic converter
    Reviewed in the United States on March 6, 2022
    Verified Purchase
    I want a refund my check engine light is still on, it did not clean my catalytic converter
    Helpful
     Report
    Amazon Customer
    1.0 out of 5 stars Delivery was quick product sucked
    Reviewed in the United States on May 23, 2022
    Verified Purchase
    Did not do what I said it would do
    Helpful
     Report
    Worry
    1.0 out of 5 stars Stop wasting your money
    Reviewed in the United States on November 23, 2021
    Verified Purchase
    This product doesn’t work, don’t wasting your money.
    Helpful
     Report
    Richard DeJesus
    5.0 out of 5 stars The best product for the money
    Reviewed in the United States on November 22, 2021
    Verified Purchase
    I am very satisfied with the results. My engine runs and quieter now too. I also pass the smog after adding rislone. I have to drive at 70-80 miles/hour for hours until tank is 1/4 full. Fill up again and do same speed. When I reach Los Angeles from San Jose, no more engine check. Went to smog check and pass. Happy with the results. I also used it on my other cars and all are running smooth now. This product really works.
    2 people found this helpful
    Helpful
     Report
    Michael K.
    5.0 out of 5 stars Trusted product
    Reviewed in the United States on February 19, 2022
    Verified Purchase
    I trust the Rislone name as products I’ve used in the past have been excellent. I passed stringent California smog test with the product so I guess it worked. It's difficult to know if the catalytic converter is actually clean but I trust this company.
    One person found this helpful
    Helpful
     Report