Lifter Type: Hydraulic Lifter
Engine Family: Buick Nailhead 364, 401, 425 c.i. 8 cyl. 1957-1966
Description: HYDRAULIC - Mutha' Thumpr" - High performance street/strip, head modification recommended to raise RPM limit, 2200+ stall, rough idle.
Cam Family: Thumpr" Hydraulic Flat Tappet Camshafts
Specifications:
- RPM Range: 2200 to 6100
- Valve Timing: 0.006
- Lobe Separation: 107°
- Intake Centerline: 102°
- Valve Lash:Hyd. Intake /Hyd. Exhaust
- Duration:287 Intake /305 Exhaust
- Duration @ .050" Lift: 235 Intake /249 Exhaust
- Valve Lift:0.49 Intake /0.475 Exhaust
- Lobe Lift: 0.327 Intake /0.317 Exhaust
Vehicle Fitments:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1957 - 1958 | Buick | Century | Base |
| 1959 - 1962 | Buick | Electra | 225 |
| 1959 - 1966 | Buick | Electra | Base |
| 1966 | Buick | Electra | Custom |
| 1959 - 1964 | Buick | Estate Wagon | Base |
| 1965 - 1966 | Buick | Gran Sport | Base |
| 1959 - 1963 | Buick | Invicta | Base |
| 1959 - 1964 | Buick | LeSabre | Base |
| 1958 | Buick | Limited | Base |
| 1963 - 1966 | Buick | Riviera | Base |
| 1965 - 1966 | Buick | Riviera | Gran Sport |
| 1957 | Buick | Roadmaster | 75 |
| 1957 - 1958 | Buick | Roadmaster | Base |
| 1965 - 1966 | Buick | Skylark | Base |
| 1957 - 1958 | Buick | Special | Base |
| 1957 - 1958 | Buick | Super | Base |
| 1962 - 1966 | Buick | Wildcat | Base |
| 1965 - 1966 | Buick | Wildcat | Custom |
| 1965 | Buick | Wildcat | Deluxe |
| 1966 | Buick | Wildcat | Gran Sport |