Following a review of recent performances in the NHRA Get Screened America Pro Mod Drag Racing Series, NHRA announced today that the minimum weight for vehicles using converters will be raised by 75 pounds. The adjustment is part of NHRA’s ongoing efforts at maintaining competition and parity within the category. The change becomes effective June 17, 2011, at the Ford NHRA Thunder Valley Nationals presented by Tri-Cities Area Ford Dealers at Bristol Dragway, the next stop for the Pro Mod series.