Thumpr camshafts use a combination of an early exhaust valve opening, a long exhaust duration, and a generous amount of intake and exhaust overlap to maximize the rough-idling characteristics of the cams. This gives you a seriously aggressive exhaust note without negatively impacting the power output or streetability of the engine.
Specification:
- Lifter Type: Hydraulic Flat Tappet
- RPM Range: 2,500-6,400
- Valve Lift (in.): 0.531 Intake /0.515 Exhaust
- Duration @ .050 in. (Deg): 242 Intake /257 Exhaust
- Lobe Separation (degrees):107
Vehicle Fitments:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1969 - 1974 | Ford | Country Sedan | Base |
| 1969 - 1974 | Ford | Country Squire | Base |
| 1969 - 1972 | Ford | Custom | Base |
| 1969 - 1976 | Ford | Custom 500 | Base |
| 1975 - 1976 | Ford | Custom 500 | Ranch Wagon |
| 1975 - 1976 | Ford | Elite | Base |
| 1970 | Ford | Fairlane | 500 |
| 1970 | Ford | Falcon | Futura, Base |
| 1969 - 1974 | Ford | Galaxie 500 | Base |
| 1969 - 1970 | Ford | Galaxie 500 | XL |
| 1972 - 1976 | Ford | Gran Torino | Base, Squire |
| 1973 - 1976 | Ford | Gran Torino | Brougham |
| 1974 - 1975 | Ford | Gran Torino | Elite |
| 1972 - 1975 | Ford | Gran Torino | Sport |
| 1969 - 1978 | Ford | LTD | Base |
| 1970 - 1976 | Ford | LTD | Brougham |
| 1975 - 1978 | Ford | LTD | Country Squire, Landau |
| 1969 - 1971 | Ford | Mustang | Boss 302, Base |
| 1971 | Ford | Mustang | Boss 351 |
| 1969 - 1970 | Ford | Mustang | Boss 429, Shelby GT-500, Shelby GT-350 |
| 1970 - 1971 | Ford | Mustang | Grande, Mach 1 |
| 1969 - 1974 | Ford | Ranch Wagon | Base |
| 1970 | Ford | Ranch Wagon | Police Cruiser |
| 1968 - 1976 | Ford | Thunderbird | Base |
| 1971 | Ford | Torino | 500 |
| 1970 - 1976 | Ford | Torino | Base |
| 1970 - 1971 | Ford | Torino | GT, Cobra, Squire, Super Cobra Jet, Brougham |
| 1968 - 1978 | Lincoln | Continental | Base |
| 1968 - 1971 | Lincoln | Mark III | Base |
| 1972 - 1976 | Lincoln | Mark IV | Base |
| 1977 - 1978 | Lincoln | Mark V | Base |
| 1969 - 1974 | Mercury | Colony Park | Base |
| 1970 - 1974 | Mercury | Cougar | Base |
| 1970 | Mercury | Cougar | Boss 429 |
| 1970 - 1971 | Mercury | Cougar | Cobra Jet, Boss 302 |
| 1970 - 1976 | Mercury | Cougar | XR-7 |
| 1970 - 1971 | Mercury | Cyclone | Spoiler, Base, GT |
| 1975 - 1978 | Mercury | Grand Marquis | Base |
| 1969 - 1970 | Mercury | Marauder | Base, X-100 |
| 1969 - 1978 | Mercury | Marquis | Brougham, Base |
| 1975 - 1976 | Mercury | Marquis | Colony Park |
| 1975 | Mercury | Montego | Brougham |
| 1972 - 1973 | Mercury | Montego | GT |
| 1976 | Mercury | Montego | MX Villager |
| 1970 - 1976 | Mercury | Montego | MX, MX Brougham, Base |
| 1970 - 1975 | Mercury | Montego | Villager |
| 1969 - 1974 | Mercury | Monterey | Base, Custom |