COMP Cams Big Mutha' Thumpr 243/257 Hydraulic Roller for Pontiac 265-455
Part # 51-602-11SKU COM51-602-11
Universal fit
| Brand | COMP Cams |
|---|---|
| Part type | Engine Camshaft |
| Advertised Exhaust Duration | 319 deg |
| Advertised Intake Duration | 299 deg |
| Assembly Lubricant Included | No |
| Basic Operating RPM Range | 2,300-6,100 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 | CL51-602-11 |
| Cam Type | Hydraulic Roller |
| Camshaft Gear Attachment | 1-Bolt |
| Camshaft Material | Billet Steel |
| Camshaft Series | Thumpr |
| Engine Family | Pontiac 265-455 C.I. 8 Cylinder (1955-1981) |
| Exhaust Duration at .050 inch Lift | 257 deg |
| Exhaust Valve Lift | 0.519 in |
| Grind Number | 299THR7 |
| Intake Duration at .050 Inch Lift | 243 deg |
| Intake Valve Lift | 0.532 in |
| K-Kit Upgrade | K51-602-11 |
| Lifter Type | Hydraulic Roller |
| Lifters Included | No |
| Lobe Separation | 107 deg |
| Usage | Street/Strip |
| Valve Springs Required | Yes |
| UPC / GTIN | 00036584313045 |
Description
Big Mutha' Thumpr 243/257 Hydraulic Roller for Pontiac 265-455. Street/strip, needs 9.5:1 compression, 2800+ stall, intake, Gears and headers, very rough idle. Distributor Gear upgrade required.
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