| Make | Model | Year |
|---|---|---|
| Buick | Apollo | 1973-1975 |
| Centurion | 1973 | |
| Century | 1973-1977 | |
| Electra | 1977-1980 | |
| Estate | 1970, 1973, 1978-1980 | |
| Gran Sport | 1968-1971 | |
| Le Sabre | 1968-1980 | |
| Regal | 1973-1977 | |
| Riviera | 1977-1978 | |
| Skylark | 1968-1972, 1975-1976 | |
| Special | 1968-1969 | |
| Sportwagon | 1968-1972 | |
| Chevy | Chevelle | 1972 |
| Corvette | 1973-1977 | |
| Impala | 1972-1974 | |
| Malibu | 1973 | |
| Monte Carlo | 1972-1973 | |
| Nova | 1974 | |
| Oldsmobile | Omega | 1975-1976 |
| Pontiac | Bonneville | 1978-1980 |
| Catalina | 1978-1980 |
Thumpr™ Hydraulic Roller Tappet Camshaft by COMP Cams®. Let's face it, nothing grabs our attention at a car show or cruise night more than the hard hitting sound a thumping, high performance idle. Thumpr™ Camshafts deliver that aggressive, head-turning sound like no other cam on the market.
| Low-End RPM: 2000 |
| Top-End RPM: 5800 |
| Intake Duration at 0.050 In Lift: 227° |
| Exhaust Duration at 0.050 In Lift: 241° |
| Intake Valve Lift: 0.494" |
| Exhaust Valve Lift: 0.48" |
| Advertised Intake Duration: 279° |
| Advertised Exhaust Duration: 297° |
| Lobe Separation: 107° |
| Intake Centerline: 102° |
| Grind Number: 279TH7 |
| Attachment: 1-Bolt |
| Material: Cast Iron |
| Valve Timing: 0.006 |
| Lobe Lift Intake: 0.319" |
| Lobe Lift Exhaust: 0.310" |
| Intake Open BTDC: 36° |
| Exhaust Open BBDC: 76° |
| Intake Close ABDC: 63° |
| Exhaust Close ATDC: 41° |
For more than 35 years, the COMP Cams® mission has never changed: to produce the highest-performing products possible, provide customers with superior service, and to lead the industry in technological development. While the COMP Performance Group™ has grown to multiple companies and hundreds of employees, COMP Cams® still retains the competitive spirit and desire to be the very best that has positioned COMP Cams® as the absolute leader in valve train components.