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Old 10-20-2019, 10:51 PM   #6 (permalink)
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Originally Posted by California98Civic View Post
Great video. But at 22:14-20 he reveals he does not know the 1990s-00s history of OEM lean burn in the USA. Is it true that lean burn has been directly banned in the USA now? Or is it just that doing so would require modifying OEM equipment, which is not legal?
It's not banned by name, but it creates NOx levels far above allowed by current EPA regulations.

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