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  2. LA retiree gets shocking surprise 3 years after car’s ... - AOL

    www.aol.com/finance/la-retiree-gets-shocking...

    Hill had no idea that her replacement catalytic converter wasn’t CARB-approved. But now she has to buy a new one, which costs an average of $2,500, according to NADA. Doug Shupe told CBS News ...

  3. Exhaust system - Wikipedia

    en.wikipedia.org/wiki/Exhaust_system

    It is a U.S. legal requirement to have a catalytic converter. [3] [4] Converters may not be removed from a vehicle that is used only for "off-road" driving in the United States. [5] The main purpose of a catalytic converter on an automobile is to reduce harmful emissions of hydrocarbons, carbon monoxide, and nitrogen oxides into the atmosphere.

  4. Secondary air injection - Wikipedia

    en.wikipedia.org/wiki/Secondary_air_injection

    During engine idle, brief but periodic negative pressure pulses in the exhaust system draw air through the aspirator valve and into the exhaust stream at the catalytic converter. This system, marketed as Pulse Air, was used by American Motors, Chrysler, and other manufacturers beginning in the 1970s. The aspirator provided advantages in cost ...

  5. Catalytic converter - Wikipedia

    en.wikipedia.org/wiki/Catalytic_converter

    Rising metal prices in the U.S. during the 2000s commodities boom led to a significant increase in converter theft. A catalytic converter can cost more than $1,000 to replace, more if the vehicle is damaged during the theft. [52] [53] [54] Apart from damaging other systems of the vehicle, theft can also cause death and injury to thieves. [55]

  6. Best OBD-II Scanners for 2024, Tested - AOL

    www.aol.com/best-obd-ii-scanners-2023-223000386.html

    While there are some cool features once you pay (I/M readiness monitors, tips from mechanics, repair cost calculator), other OBD-II scanners provide access to similar functions without a monthly ...

  7. Selective catalytic reduction - Wikipedia

    en.wikipedia.org/wiki/Selective_catalytic_reduction

    Commercial selective catalytic reduction systems are typically found on large utility boilers, industrial boilers, and municipal solid waste boilers and have been shown to reduce NO x by 70-95%. [1] More recent applications include diesel engines, such as those found on large ships, diesel locomotives, gas turbines, and automobiles.

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