This gives you a seriously aggressive exhaust note without negatively impacting the power output or streetability of the engine. Thumpr camshafts are available in different grind profiles; each one will produce a rough, racy exhaust note and impressive amounts of horsepower and torque within a different rpm range.
Specification:
- Lifter Type: Hydraulic Flat Tappet
- RPM Range: 2,000-5,800
- Valve Lift (in.): 0.491 Intake /0.476 Exhaust
- Duration @ .050 in. (Deg): 227 Intake /241 Exhaust
- Lobe Separation (degrees):107
Vehicle Fitments:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1966 - 1967 | American Motors | Ambassador | 990 |
| 1966 - 1970 | American Motors | Ambassador | Base |
| 1971 - 1974 | American Motors | Ambassador | Brougham |
| 1966 - 1971 | American Motors | Ambassador | DPL |
| 1968 - 1972 | American Motors | Ambassador | SST |
| 1966 - 1968 | American Motors | American | Base, 440 |
| 1967 - 1968 | American Motors | American | Rogue |
| 1968 - 1979 | American Motors | AMX | Base |
| 1966 | American Motors | Classic | 770, Base |
| 1978 - 1979 | American Motors | Concord | Base |
| 1979 | American Motors | Concord | Limited, DL |
| 1972 - 1976 | American Motors | Gremlin | Base |
| 1976 | American Motors | Gremlin | Custom |
| 1977 | American Motors | Hornet | AMX |
| 1970 - 1977 | American Motors | Hornet | Base |
| 1971 | American Motors | Hornet | SC/360 |
| 1971 - 1977 | American Motors | Hornet | Sportabout |
| 1970 - 1972 | American Motors | Hornet | SST |
| 1971 - 1974 | American Motors | Javelin | AMX |
| 1968 - 1974 | American Motors | Javelin | Base |
| 1968 - 1972 | American Motors | Javelin | SST |
| 1970 | American Motors | Javelin | SST Mark Donohue, SST Trans Am |
| 1966 - 1967 | American Motors | Marlin | Base |
| 1971 - 1978 | American Motors | Matador | Base |
| 1974 | American Motors | Matador | X, Brougham |
| 1978 | American Motors | Pacer | Base |
| 1979 | American Motors | Pacer | Limited, DL |
| 1969 | American Motors | Rambler | 440, Base, Rogue, Hurst SC/Rambler |
| 1968 | American Motors | Rebel | 550 |
| 1967 - 1968 | American Motors | Rebel | 770 |
| 1967 - 1970 | American Motors | Rebel | Base, SST |
| 1970 | American Motors | Rebel | The Machine |
| 1966 | American Motors | Rogue | Base |
| 1979 | American Motors | Spirit | Base |
| 1974 | Bricklin | SV-1 | Base |
| 1974 | International | 100 | Base, Travelall |
| 1974 | International | 200 | Travelall, Base |
| 1974 - 1983 | Jeep | Cherokee | Base |
| 1981 - 1983 | Jeep | Cherokee | Chief |
| 1981 | Jeep | Cherokee | Laredo |
| 1983 | Jeep | Cherokee | Pioneer |
| 1974 - 1980 | Jeep | Cherokee | S |
| 1978 - 1980 | Jeep | Cherokee | Wide Track |
| 1975 - 1982 | Jeep | Cherokee | Wide Track Chief |
| 1979 - 1980 | Jeep | Cherokee | Wide Track Golden Eagle |
| 1980 - 1983 | Jeep | Cherokee | Wide Track Laredo |
| 1980 | Jeep | Cherokee | Wide Track Limited |
| 1971 - 1981 | Jeep | CJ5 | Base |
| 1977 - 1980 | Jeep | CJ5 | Golden Eagle |
| 1980 - 1981 | Jeep | CJ5 | Laredo |
| 1975 - 1981 | Jeep | CJ5 | Renegade |
| 1971 - 1975 | Jeep | CJ6 | Base |
| 1976 - 1981 | Jeep | CJ7 | Base, Renegade |
| 1977 - 1979 | Jeep | CJ7 | Golden Eagle |
| 1980 | Jeep | CJ7 | Golden Hawk |
| 1980 - 1981 | Jeep | CJ7 | Laredo |
| 1972 - 1973 | Jeep | Commando | Base |
| 1984 - 1991 | Jeep | Grand Wagoneer | Base |
| 1984 - 1985 | Jeep | Grand Wagoneer | Limited |
| 1971 - 1973 | Jeep | J-100 | Base |
| 1970 - 1973 | Jeep | J-2500 | Base |
| 1970 - 1973 | Jeep | J-2600 | Base |
| 1970 - 1971 | Jeep | J-3800 | Base |
| 1971 - 1973 | Jeep | J-4500 | Base |
| 1971 - 1973 | Jeep | J-4600 | Base |
| 1971 - 1973 | Jeep | J-4700 | Base |
| 1971 - 1973 | Jeep | J-4800 | Base |
| 1974 - 1988 | Jeep | J10 | Base |
| 1982 - 1984 | Jeep | J10 | Laredo |
| 1974 - 1988 | Jeep | J20 | Base |
| 1983 | Jeep | Wagoneer | Alpina |
| 1972 - 1983 | Jeep | Wagoneer | Base |
| 1982 - 1983 | Jeep | Wagoneer | Brougham |
| 1973 - 1976 | Jeep | Wagoneer | Custom |
| 1979 - 1983 | Jeep | Wagoneer | Limited |