Crackdown on Emissions 'Defeat Devices' Has Amateur Racers Up in Arms
2 min read
A recent court decision against a maker of aftermarket parts, coupled with the new possibility of criminal charges, has jolted an industry.
Racing enthusiasts are concerned because the E.P.A. argued in court that under the Clean Air Act no road vehicle engine can be modified, even for exclusive use on a racetrack. Taken to its extreme, that logic could prohibit stock cars like NASCAR's.

In November, the E.P.A.'s Office of Enforcement and Compliance issued a study that found pollution controls had been removed from 550,000 diesel trucks over a 10-year period. The modified trucks spewed 1980s levels of contaminants, sending an avoidable 570,000 tons of nitrogen oxides and 5,000 tons of particulate matter into the…
Roy Furchgott
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