Stock Car Classification Guides

There are many classes within NHRA's Stock and Super Stock eliminators. Each class is defined by a ratio of vehicle shipping weight and a horsepower factor. The NHRA Stock Car Classification Guide is used to position a vehicle in its proper class.

Below on this page, you will find all years and makes in the NHRA Stock Car Classification Guide. Clicking on a link will allow you to either download the file to your hard drive or to open the file in your spreadsheet program.

On the left side of each Guide, you find the vehicle model descriptions, and across the top are the available engine, identified by cubic inch displacement and original, advertised horsepower rating. At the bottom of each column, you may find another number which represents the NHRA factored horsepower. This is the number used in determining classification (not the advertised), and some engines will have a different factored horsepower for Stock and Super Stock.

The numbers in the middle of the page are the power to weight factors for each model and engine combination, and identify which particular class a vehicle fits into. For instance, if the particular vehicle/engine combination you are looking at has a factor of 8.67 in Stock Eliminator, the vehicle fits in B/Stock, which according to the 2001 NHRA Rulebook, is for vehicles with a power to weight factor of between 8.50 and 8.99 pounds per horsepower.

If you do not find a particular vehicle/engine combination listed in the Guide, it means specifications for that combination were never received from the manufacturer, and the vehicle is not eligible for competition in Stock or Super Stock.

Class guides updated as of 3/24/08.

Files can be opened with Excel, or similar spreadsheet program. If you do not have a suitable program, click here to download the Excel viewer.

American Motors  Top
1964 1965 1966 1967 1968 1969 1970 1971 1972
1973 1974 1975 1977 1979 1984

Buick  Top
1962 1963 1964 1965 1966 1967 1968 1969 1970
1971 1972 1973 1974 1975 1976 1977 1978 1979
1980 1981 1982 1983 1984 1985 1986 1987 1988
1994 1995 1996 1997

Cadillac  Top
1955 1956 1957 1958 1959 1960 1961 1963 1964
1965 1966 1969 1979 1977 1978 1980 1986 1987
1988 1989 1990

Chevrolet  Top
1955 1956 1957 1958 1959 1960 1961 1962 1963
1964 1965 1966 1967 1968 1969 1970 1971 1972
1973 1974 1975 1976 1977 1978 1979 1980 1981
1982 1983 1984 1985 1986 1987 1988 1989 1990
1991 1992 1993 1994 1995 1996 1997 1998 1999
2000 2001 2002 2003 2004 2005 2006 2007 2008

Chrysler  Top
1961 1962 1963 1964 1965 1966 1967 1968 1969
1970 1971 1972 1973 1974 1975 1976 1977 1978
1979 1980 1981 1982 1983 1984 1985 1986 1987
1988 1989 1990 1991 1992 1993 1994 1995 1996
1997 1998 1999 2000 2001 2002 2003 2004

Dodge  Top
1960 1961 1962 1963 1964 1965 1966 1967 1968
1969 1970 1971 1972 1973 1974 1975 1976 1977
1978 1979 1980 1981 1982 1983 1984 1985 1986
1987 1988 1989 1990 1991 1992 1993 1994 1995
1996 1997 1998 1999 2000 2001 2002 2003 2004
2007

Ford  Top
1960 1961 1962 1963 1964 1965 1966 1967 1968
1969 1970 1971 1972 1973 1974 1975 1976 1977
1978 1979 1980 1981 1982 1983 1984 1985 1986
1987 1988 1989 1990 1991 1992 1993 1994 1995
1996 1997 1998 1999 2000 2001 2003 2005 2006
2007 2008

2006 2007

1991

1960 1961 1962 1963 1964 1965 1966 1967 1968
1969 1970 1971 1972 1973 1974 1975 1976 1977
1978 1979 1980 1981 1982 1983 1984 1985 1986
1987 1988 1989 1990 1991 1992 1993 1994 1995
1999 2000 2001 2002 2003 2004

1968 1969 1971 1972 1973 1974

1960 1961 1962 1963 1964 1965 1966 1967 1968
1969 1970 1971 1972 1973 1974 1975 1976 1977
1978 1979 1980 1981 1982 1983 1984 1985 1986
1987 1988 1989 1990 1991 1992 1993 1994 1995
1996 1997 1998 1999 2000

1960 1961 1962 1963 1964 1965 1966 1967 1968
1969 1970 1971 1972 1973 1974 1975 1976 1977
1978 1979 1980 1981 1982 1983 1984 1985 1986
1987 1988 1989 1990 1991 1992 1993 1994 1995
1996 1997 1998 1999 2000 2001 2002 2003 2004
2005 2006 2007 2008

1991 1993 1994 1995 2006 2007 2008

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