The American love affair with automobiles includes watching and participating in motorsports. For decades Americans have converted their street vehicles into racecars, from pre-World War II classics to modern era performance cars. It has brought joy and jobs to millions. However, the U.S. Environmental Protection Agency has issued a proposed rule that would do away with this time honored tradition. It would outlaw the conversion of any type of emissions-certified vehicle into a racecar, and make it illegal to sell any emissions-related parts for those cars. The Clean Air Act prohibits the EPA from regulating racecars. Tell EPA Administrator Gina McCarthy to remove this provision from the â€œGreenhouse Gas Emissions and Fuel Efficiency Standards for Medium- & Heavy-Duty Engines-Phase 2″ rule.