Modulator; Push In Single With Yellow Stripe
| NAME | YEARS |
|---|---|
| C4 | 1973 - 1981 |
| YEARS | VEHICLE | DRIVE TYPES |
|---|---|---|
| 1973 - 1976 | Ford Torino | RWD |
| 1977 - 1981 | Ford Thunderbird | RWD |
| 1975 - 1979 | Ford Ranchero | RWD |
| 1973 - 1980 | Ford Pinto | RWD |
| 1973 - 1974 | Ford P-350 | RWD |
| 1974 - 1978 | Ford Mustang II | RWD |
| 1973 - 1981 | Ford Mustang | RWD |
| 1973 - 1977 | Ford Maverick | RWD |
| 1977 - 1979 | Ford LTD II | RWD |
| 1973 - 1980 | Ford LTD | RWD |
| 1975 - 1981 | Ford Granada | RWD |
| 1975 - 1976 | Ford Gran Torino | RWD |
| 1973 - 1974 | Ford Galaxie 500 | RWD |
| 1978 - 1981 | Ford Fairmont | RWD |
| 1973 - 1977 | Ford F-350 | RWD |
| 1973 - 1977 | Ford F-250 | RWD, 4WD |
| 1977 - 1978 | Ford F-150 | RWD, 4WD |
| 1973 - 1981 | Ford F-100 | RWD, 4WD |
| 1975 - 1976 | Ford Elite | RWD |
| 1976 - 1977 | Ford E-150 Econoline Club Wagon | RWD |
| 1976 - 1977 | Ford E-150 Econoline | RWD |
| 1975 - 1977 | Ford E-100 Econoline Club Wagon | RWD |
| 1973 - 1977 | Ford E-100 Econoline | RWD |
| 1973 - 1977 | Ford Custom 500 | RWD |
| 1975 - 1975 | Ford Courier | RWD |
| 1973 - 1977 | Ford Bronco | 4WD |
| 1977 - 1980 | Lincoln Versailles | RWD |
| 1978 - 1981 | Mercury Zephyr | RWD |
| 1973 - 1974 | Mercury Monterey | RWD |
| 1973 - 1976 | Mercury Montego | RWD |
| 1975 - 1980 | Mercury Monarch | RWD |
| 1973 - 1980 | Mercury Marquis | RWD |
| 1980 - 1980 | Mercury Grand Marquis | RWD |
| 1973 - 1981 | Mercury Cougar | RWD |
| 1973 - 1977 | Mercury Comet | RWD |
| 1973 - 1981 | Mercury Capri | RWD |
| 1975 - 1980 | Mercury Bobcat | RWD |