NASCAR senior vice president and chief operating officer Mike Helton said a rule change involving air dam clearances and spoiler sizes for all three car makes will go into affect at the Feb. 21 race at Rockingham. The change was implemented at the season finale in Atlanta last season as a test. NASCAR issued three changes at Atlanta: The height of rear spoilers were increased 1 1/2 inches on all car makes; all cars had to have a minimum rear spoiler angle of 65 degrees; and the front end air dam ground clearance for all cars was mandated to be 3 1/2 inches( That’s Racin’ )
