The following Stock/Super Stock horsepower changes were released June 26, 2019 produced by the Automatic Horsepower Factoring System (AHFS). This is the first of two scheduled horsepower adjustments for this year. All changes are effective June 26, 2019. It should be noted that these changes include only results produced by the AHFS, and do not include written letters or requests. Those changes are listed separately.

        The AHFS is a program based on actual run data compiled from all available runs at NHRA events. The data-based format provides the ability to calculate average performances for any class and/or engine combination in Stock and Super Stock. The trigger point for the system is 1.00-second or more under the respective index, and must be produced on two different occasions. Engine-combination averages and class averages are then computed and analyzed to determine if a change is warranted. The amount of change is calculated on a stepped percentage basis. Where applicable, adjustments will be effective for the specific car model or body style being evaluated. An automatic adjustment is instituted outside the two-time a year process when a 1.20 and under run is recorded during any NHRA event.

Stock Horsepower Changes

Complete for 1^st half rating period of 2019

Engine                   OEM          NHRA      New

Make          CID     HP            HP           HP           Years Affected Transmission

AMC            258      110           150          152          1979 Pacer          A/T

Dodge         360      210           271          275          1980 D-150        A/T

Dodge         370      340           360          369          2009 Challenger A/T

Dodge         370      340           360          369          2010 Challenger A/T

Dodge         135      146           160          164          1986 Omni          M/T

Ford            302      140           143          145          1979 Fairmont    M/T

Ford            302      350           385          390          2014 Cobra Jet    A/T

Ford            330      510           510          522          2012 Cobra Jet    A/T

Pont            400      185           275          282          1975 Firebird      A/T

M/T – Manual Transmission

A/T – Automatic Transmission

Super Stock Horsepower Changes

Complete for 1^st half rating period of 2019

Engine                   OEM          NHRA     

Make          CID     HP            HP           New HP  Years Affected Transmission

Chev           350      230           270          277          1988 GT FWD      A/T   

Pont            350      225           270          277          1988 GT FWD      A/T   

Chev           350      230           270          277          1989 GT FWD      A/T   

Pont            350      230           270          277          1989 GT FWD      A/T   

Chev           350      247           289          293          1990 GT RWD     A/T   

Chev           350      250           289          293          1990 GT RWD     A/T   

Chev           350      247           289          293          1991 GT RWD     A/T   

Chev           454      425           435          445          1971 GT FWD      A/T

Chev           350      590           590          598          2017 COPO         A/T

Chev           350      590           590          598          2018 COPO         A/T

Dodge         512      450           478          489          2011 Drag Pak    A/T

Ford            302      575           583          597          2016 Cobra Jet    A/T

A/T – Automatic Transmission