NHRA Officials announced today that the index for the new NHRA Factory Stock Showdown has been adjusted to 9.90.  The program was announced last month with the inaugural NHRA Factory Stock Showdown to be held on Friday of the 2012 Mac Tools U.S. Nationals presented by Auto Plus at Lucas Oil Raceway at Indianapolis.

The competition will showcase the Ford Mustang Cobra Jet, Dodge Mopar Challenger Drag Pak and Chevrolet COPO Camaro and will feature 2008 and newer models.