As the result of runs under the Automatic Horsepower Factoring System (AHFS) 1.20-second under policy at the Dutch Classic National Open, the following changes have been made.

The horsepower rating for 75-76 Chevrolet Monza, entries with the 262 cubic inch engine and a factory rating of 110 currently rated at 165 has been increased by six horsepower, to 171 horsepower; for Stock Eliminator.

The horsepower rating for 2012 Chevrolet COPO Camaro, entries with the 327 cubic inch engine and a factory rating of 550 currently rated at 550 has been increased by eighteen horsepower, to 568 horsepower; for Super Stock Eliminator.

The horsepower rating for 2010 Ford Cobra Jet, entries with the 281 cubic inch engine and a factory rating of 235 currently rated at 257 has been increased by nine horsepower, to 266 horsepower; for Stock Eliminator.

NHRA's 2012 Automatic Horsepower Factoring System outlines that any run of 1.20-second or more under the index will receive an immediate index decrease or horsepower increase. These changes are effective Oct. 16, 2012.