There is a proposed regulation put forth by the EPA that would prohibit the conversion of production cars into race cars as well as the sales of equipment to do so. This regulation is conveniently tucked into the seemingly unrelated "Greenhouse Gas Emissions and Fuel Efficiency Standards for Medium- and Heavy-Duty Engines and Vehicles—Phase 2" regulation.
This means that converting sports cars, sedans, hatches, and pretty much every vehicle that have commonly been used for track-day-only duties would be illegal. Yes, you read that right, it would be illegal. This takes the Clean Air Act to a completely different level. The Clean Air Act puts the kibosh on certain modifications if the driver wants to continue to drive them on the streets, but does not extend to those track day only vehicles.
It is not clear what vehicles would be allowed to be converted to track cars. Perhaps they mean that only special construction cars would be allowed to be used on tracks around the nation. Is the EPA looking to put an end to the race car and track day culture?
How much damage to the environment is a handful of drivers doing on the weekends compared to those that drive 80+ miles during their daily commute?
Check out the stand that SEMA is making in their press release below: