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2. Diesel exhaust - Wikipedia

   en.wikipedia.org/wiki/Diesel_exhaust

   [not verified in body] While total nitrogen oxides from petrol cars have decreased by around 96% through the adoption of exhaust catalytic converters as of 2012, diesel cars still produce nitrogen oxides at a similar level to those bought 15 years earlier under real-world tests; hence, diesel cars emit around 20 times more nitrogen oxides than ...

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. Catalytic converter - Wikipedia

   en.wikipedia.org/wiki/Catalytic_converter

   In the United States, it is a violation of Section 203(a)(3)(A) of the 1990 amended Clean Air Act for a vehicle repair shop to remove a converter from a vehicle, or cause a converter to be removed from a vehicle, except in order to replace it with another converter, [33] and Section 203(a)(3)(B) makes it illegal for any person to sell or to ...

5. Exhaust gas - Wikipedia

   en.wikipedia.org/wiki/Exhaust_gas

   United States Light-Duty Vehicle, Light-Duty Truck, and Medium-Duty Passenger Vehicle—Tier 2 Exhaust Emission Standards (for Bin 5) [4] Component Emission Rate Annual pollution emitted NMOG (Volatile organic compounds) 0.075 grams/mile (0.046 g/km) 2.1 pounds (0.95 kg) Carbon Monoxide 3.4 grams/mile (2.1 g/km) 94 pounds (43 kg) NO X

6. Exhaust manifold - Wikipedia

   en.wikipedia.org/wiki/Exhaust_manifold

   Exhaust manifolds are generally simple cast iron or stainless steel [2] units which collect engine exhaust gas from multiple cylinders and deliver it to the exhaust pipe. For many engines, there are aftermarket tubular exhaust manifolds known as headers in American English , as extractor manifolds in British and Australian English , [ 3 ] and ...

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