Crackdown on Emissions ‘Defeat Devices’ Has Amateur Racers Up in Arms

A recent court decision against a maker of aftermarket parts, coupled with the new possibility of criminal charges, has jolted an industry.

By Roy Furchgott

You might think Volkswagen’s $14.7 billion dirty diesel settlement in 2016 served as a warning not to tamper with vehicle emission systems. Apparently not.

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