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COMP Cams Mutha' Thumpr 235/249 Hydraulic Flat Cam for Pontiac 265-455
Part # 51-601-5
Description
Mutha' Thumpr 235/249 Hydraulic Flat Cam for Pontiac 265-455. High performance street/strip, needs 9:1 compression, 2500+ stall, intake, Gears and headers, rough idle.
Specifications
| Advertised Exhaust Duration | 305 deg |
|---|---|
| Advertised Intake Duration | 287 deg |
| Amazon ASIN | B005H89RZE |
| Assembly Lubricant Included | Yes |
| Basic Operating RPM Range | 2,200-6,100 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 and Lifter Kit Upgrade | CL51-601-5 |
| Cam Type | Hydraulic Flat Tappet |
| Camshaft Gear Attachment | 1-Bolt |
| Camshaft Material | Cast Iron |
| Camshaft Series | Thumpr |
| Engine Family | Pontiac 265-455 C.I. 8 Cylinder (1955-1981) |
| Exhaust Duration at .050 inch Lift | 249 deg |
| Exhaust Valve Lift | 0.475 in |
| Grind Number | 287TH7 |
| Intake Duration at .050 Inch Lift | 235 deg |
| Intake Valve Lift | 0.49 in |
| K-Kit Upgrade | K51-601-5 |
| Lifter Type | Hydraulic Flat Tappet |
| Lifters Included | No |
| Lobe Separation | 107 deg |
| Usage | Street/Strip |
| Valve Springs Required | Yes |
| UPC / GTIN | 00036584213253 |