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COMP Cams Classic Big Mutha Thumpr 227/241 Hydraulic Flat Cam 364, 401, 425 Nailhead for Buick
Part # 91-602-5
Description
Classic Big Mutha' Thumpr 227/241 Hydraulic Flat Cam Buick 364, 401, 425 Nailhead. Street/strip needs 9.5:1 compression, 2800+ stall, intake, Gears and headers, very rough idle.
Specifications
| Advertised Exhaust Duration | 305 deg |
|---|---|
| Advertised Intake Duration | 287 deg |
| Amazon ASIN | B005H89RLS |
| Assembly Lubricant Included | Yes |
| Basic Operating RPM Range | 2,500-6,400 RPM |
| C.A.R.B. Exempt for California Certified Vehicles Manufactured Before 1965? | Yes, but must meet tailpipe emission standards for year of vehicle. |
| C.A.R.B. Exempt for Federally Certified Vehicles Manufactured Before 1967? | Yes, but must meet tailpipe emission standards for year of vehicle. |
| C.A.R.B. Exempt for Foreign Vehicles Manufactured Before 1967? | Yes, but must meet tailpipe emission standards for year of vehicle. |
| C.A.R.B. Exempt for On-Road Vehicles? | No |
| C.A.R.B. Exempt for Racing and Off-Road Only Vehicles? | Yes, but must be a race/competition only vehicle. |
| Cam Type | Hydraulic Flat Tappet |
| Camshaft Material | Cast Iron |
| Camshaft Series | Classic Thumpr |
| Engine Family | Buick Nailhead 364, 401, 425 c.i. 8 Cylinder (1957-1966) |
| Exhaust Duration at .050 inch Lift | 249 deg |
| Exhaust Valve Lift | 0.475 in |
| Grind Number | 295TH7 |
| Intake Duration at .050 Inch Lift | 235 deg |
| Intake Valve Lift | 0.49 in |
| Lifter Type | Hydraulic Flat Tappet |
| Lifters Included | No |
| Lobe Separation | 107 deg |
| Usage | Street/Strip |
| Valve Springs Required | Yes |
| UPC / GTIN | 00036584213291 |
| Year | Make | Model | Submodel | Engine |
|---|---|---|---|---|
| 1957 - 1958 | Buick | Century | Base | 6.0L V8 |
| 1959 - 1962 | Buick | Electra | 225, Base | 6.6L V8 |
| 1963 | Buick | Electra | Base | 6.6L V8 |
| 1964 - 1965 | Buick | Electra | Base | 6.6L V8, 7.0L V8 |
| 1966 | Buick | Electra | Base, Custom | 6.6L V8, 7.0L V8 |
| 1959 - 1961 | Buick | Estate Wagon | Base | 6.0L V8, 6.6L V8 |
| 1962 - 1963 | Buick | Estate Wagon | Base | 6.6L V8 |
| 1964 | Buick | Estate Wagon | Base | 6.6L V8, 7.0L V8 |
| 1965 - 1966 | Buick | Gran Sport | Base | 6.6L V8 |
| 1959 - 1963 | Buick | Invicta | Base | 6.6L V8 |
| 1959 - 1961 | Buick | LeSabre | Base | 6.0L V8, 6.6L V8 |
| 1962 - 1963 | Buick | LeSabre | Base | 6.6L V8 |
| 1964 | Buick | LeSabre | Base | 6.6L V8, 7.0L V8 |
| 1958 | Buick | Limited | Base | 6.0L V8 |
| 1963 - 1964 | Buick | Riviera | Base | 6.6L V8, 7.0L V8 |
| 1965 | Buick | Riviera | Base, Gran Sport | 6.6L V8, 7.0L V8 |
| 1966 | Buick | Riviera | Base, Gran Sport | 7.0L V8 |
| 1957 | Buick | Roadmaster | 75, Base | 6.0L V8 |
| 1958 | Buick | Roadmaster | Base | 6.0L V8 |
| 1965 - 1966 | Buick | Skylark | Base | 6.6L V8 |
| 1957 - 1958 | Buick | Special | Base | 6.0L V8 |
| 1957 - 1958 | Buick | Super | Base | 6.0L V8 |
| 1962 - 1963 | Buick | Wildcat | Base | 6.6L V8 |
| 1964 | Buick | Wildcat | Base | 6.6L V8, 7.0L V8 |
| 1965 | Buick | Wildcat | Base, Custom, Deluxe | 6.6L V8, 7.0L V8 |
| 1966 | Buick | Wildcat | Base, Custom, Gran Sport | 6.6L V8, 7.0L V8 |