| 1970 | Peterbilt | All models with rear air springs | | Fits Heavy Duty Conventional trucks equipped with FLEXAIR suspension. |
| 1971 | Peterbilt | All models with rear air springs | | Fits Heavy Duty Conventional trucks equipped with FLEXAIR suspension. |
| 1972 | Peterbilt | All models with rear air springs | | Fits Heavy Duty Conventional trucks equipped with FLEXAIR suspension. |
| 1973 | Peterbilt | All models with rear air springs | | Fits Heavy Duty Conventional trucks equipped with FLEXAIR suspension. |
| 1974 | Peterbilt | All models with rear air springs | | Fits Heavy Duty Conventional trucks equipped with FLEXAIR suspension. |
| 1975 | Peterbilt | All models with rear air springs | | Fits Heavy Duty Conventional trucks equipped with FLEXAIR suspension. |
| 1976 | Peterbilt | All models with rear air springs | | Fits Heavy Duty Conventional trucks equipped with FLEXAIR suspension. |
| 1977 | Peterbilt | All models with rear air springs | | Fits Heavy Duty Conventional trucks equipped with FLEXAIR suspension. |
| 1978 | Peterbilt | All models with rear air springs | | Fits Heavy Duty Conventional trucks equipped with FLEXAIR suspension. |
| 1979 | Peterbilt | All models with rear air springs | | Fits Heavy Duty Conventional trucks equipped with FLEXAIR suspension. |
| 1980 | Peterbilt | All models with rear air springs | | Fits Heavy Duty Conventional trucks equipped with FLEXAIR suspension. |
| 1981 | Peterbilt | All models with rear air springs | | Fits Heavy Duty Conventional trucks equipped with FLEXAIR suspension. |
| 1982 | Peterbilt | All models with rear air springs | | Fits Heavy Duty Conventional trucks equipped with FLEXAIR suspension. |
| 1983 | Peterbilt | All models with rear air springs | | Fits Heavy Duty Conventional trucks equipped with FLEXAIR suspension. |
| 1984 | Peterbilt | All models with rear air springs | | Fits Heavy Duty Conventional trucks equipped with FLEXAIR suspension. |
| 1985 | Peterbilt | All models with rear air springs | | Fits Heavy Duty Conventional trucks equipped with FLEXAIR suspension. |
| 1986 | Peterbilt | All models with rear air springs | | Fits Heavy Duty Conventional trucks equipped with FLEXAIR suspension. |
| 1987 | Peterbilt | All models with rear air springs | | Fits Heavy Duty Conventional trucks equipped with FLEXAIR suspension. |
| 1988 | Peterbilt | All models with rear air springs | | Fits Heavy Duty Conventional trucks equipped with FLEXAIR suspension. |
| 1989 | Peterbilt | All models with rear air springs | | Fits Heavy Duty Conventional trucks equipped with FLEXAIR suspension. |
| 1990 | Peterbilt | All models with rear air springs | | Fits Heavy Duty Conventional trucks equipped with FLEXAIR suspension. |
| 1991 | Peterbilt | All models with rear air springs | | Fits Heavy Duty Conventional trucks equipped with FLEXAIR suspension. |
| 1992 | Peterbilt | All models with rear air springs | | Fits Heavy Duty Conventional trucks equipped with FLEXAIR suspension. |
| 1993 | Peterbilt | All models with rear air springs | | Fits Heavy Duty Conventional trucks equipped with FLEXAIR suspension. |
| 1994 | Peterbilt | All models with rear air springs | | Fits Heavy Duty Conventional trucks equipped with FLEXAIR suspension. |
| 1995 | Peterbilt | All models with rear air springs | | Fits Heavy Duty Conventional trucks equipped with FLEXAIR suspension. |
| 1996 | Peterbilt | All models with rear air springs | | Fits Heavy Duty Conventional trucks equipped with FLEXAIR suspension. |
| 1997 | Peterbilt | All models with rear air springs | | Fits Heavy Duty Conventional trucks equipped with FLEXAIR suspension. |
| 1998 | Peterbilt | All models with rear air springs | | Fits Heavy Duty Conventional trucks equipped with FLEXAIR suspension. |
| 1999 | Peterbilt | All models with rear air springs | | Fits Heavy Duty Conventional trucks equipped with FLEXAIR suspension. |
| 2000 | Peterbilt | All models with rear air springs | | Fits Heavy Duty Conventional trucks equipped with FLEXAIR suspension. |
| 2001 | Peterbilt | All models with rear air springs | | Fits Heavy Duty Conventional trucks equipped with FLEXAIR suspension. |
| 2002 | Peterbilt | All models with rear air springs | | Fits Heavy Duty Conventional trucks equipped with FLEXAIR suspension. |
| 2003 | Peterbilt | All models with rear air springs | | Fits Heavy Duty Conventional trucks equipped with FLEXAIR suspension. |
| 2004 | Peterbilt | All models with rear air springs | | Fits Heavy Duty Conventional trucks equipped with FLEXAIR suspension. |
| 2005 | Peterbilt | All models with rear air springs | | Fits Heavy Duty Conventional trucks equipped with FLEXAIR suspension. |
| 2006 | Peterbilt | All models with rear air springs | | Fits Heavy Duty Conventional trucks equipped with FLEXAIR suspension. |
| 2007 | Peterbilt | All models with rear air springs | | Fits Heavy Duty Conventional trucks equipped with FLEXAIR suspension. |
| 2008 | Peterbilt | All models with rear air springs | | Fits Heavy Duty Conventional trucks equipped with FLEXAIR suspension. |
| 2009 | Peterbilt | All models with rear air springs | | Fits Heavy Duty Conventional trucks equipped with FLEXAIR suspension. |
| 1980 | Ford | F-800 | | Fits LoPro models only. Heavy Duty Kit |
| 1981 | Ford | F-800 | | Fits LoPro models only. Heavy Duty Kit |
| 1982 | Ford | F-800 | | Fits LoPro models only. Heavy Duty Kit |
| 1983 | Ford | F-800 | | Fits LoPro models only. Heavy Duty Kit |
| 1984 | Ford | F-800 | | Fits LoPro models only. Heavy Duty Kit |
| 1985 | Ford | F-800 | | Fits LoPro models only. Heavy Duty Kit |
| 1986 | Ford | F-800 | | Fits LoPro models only. Heavy Duty Kit |
| 1987 | Ford | F-800 | | Fits LoPro models only. Heavy Duty Kit |
| 1988 | Ford | F-800 | | Fits LoPro models only. Heavy Duty Kit |
| 1989 | Ford | F-800 | | Fits LoPro models only. Heavy Duty Kit |
| 1990 | Ford | F-800 | | Fits LoPro models only. Heavy Duty Kit |
| 1991 | Ford | F-800 | | Fits LoPro models only. Heavy Duty Kit |
| 1992 | Ford | F-800 | | Fits LoPro models only. Heavy Duty Kit |
| 1993 | Ford | F-800 | | Fits LoPro models only. Heavy Duty Kit |
| 1994 | Ford | F-800 | | Fits LoPro models only. Heavy Duty Kit |
| 1995 | Ford | F-800 | | Fits LoPro models only. Heavy Duty Kit |
| 1996 | Ford | F-800 | | Fits LoPro models only. Heavy Duty Kit |
| 1997 | Ford | F-800 | | Fits LoPro models only. Heavy Duty Kit |
| 1998 | Ford | F-800 | | Fits LoPro models only. Heavy Duty Kit |
| 1999 | Ford | F-800 | | Fits LoPro models only. Heavy Duty Kit |