I’d guess that’s true in the US too, if you modify the engine or transmission or exhaust system, etc. But adding something to your car without modifying the exi

I’d guess that’s true in the US too, if you modify the engine or transmission or exhaust system, etc. But adding something to your car without modifying the existing systems has no regulation and no certification process, which he sorta talks about in the article re: police inability to enforce. As long as there aren’t other laws you violate, hanging a big fan out the window might not count as modifying the car.