OXFORD, N.C. --- Dill Air Controls Products is recalling 1.8 million replacement snap-in rubber valve stems sold between November 2006 and July 2007, the National Highway Traffic Safety Administration announced.
According to the NHTSA, these valves may lack the required additive to protect the rubber against deterioration from ozone exposure. As a result, the valve stems may weather and crack earlier than normal when they're exposed to high levels of ozone.







