As the result of runs under the Automatic Horsepower Factoring System (AHFS) 1.20-second under policy at the NHRA LODRS 1-7 event, the following change has been made.

The horsepower rating for 2012 Chevrolet COPO Camaro, entries with the 327 cubic inch engine and a factory rating of 550 currently rated at 568, has been increased by twenty five horsepower, to 593 horsepower; for Super Stock Eliminator.

NHRA's 2013 Automatic Horsepower Factoring System outlines that any run of 1.20-seconds or more under the index will receive an immediate index decrease or horsepower increase. These changes are effective Sep. 10, 2013.