Readers may recall that the current EPA interpretation of the Clean Air Act does not allow any motor vehicle designed for street use—car, truck or motorcycle—to be converted into a dedicated racecar. This issue came to SEMA’s attention in 2015, when the EPA took the position that converted vehicles must remain emissions-compliant, even if they are no longer driven on public streets or highways. Although the EPA did not finalize the proposed rule, the agency still maintains that modifying the emissions system of a motor vehicle to convert it for racing is illegal. Manufacturing, selling and installing race parts for converted vehicles would also be a violation. Most recently, the EPA also announced that enforcement against performance tuning and parts is a top priority for 2020.