Rolling coal is the practice of tampering with a vehicle’s emissions control system, causing it to spew black clouds of sooty exhaust.

  • luckyhunter@lemmy.world
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    1 year ago

    It’s a federal emission standard though, not a state one. It’s only illegal to do in New Jersey, Maryland and Maine. Every other state once you own it, you can install these devices, or do a EGR delete entirely if you want to. In states that do emission testing on private vehicles you’d want it to be reversible of course.