COMP Cams Big Mutha' Thumpr 242/257 Hydraulic Flat Cam for Oldsmobile 260-455
Part # 42-602-5SKU COM42-602-5
Universal fit
| Brand | COMP Cams |
|---|---|
| Part type | Engine Camshaft |
| Advertised Exhaust Duration | 312 deg |
| Advertised Intake Duration | 294 deg |
| Amazon ASIN | B005H89WWW |
| 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 and Lifter Kit Upgrade | CL42-602-5 |
| Cam Type | Hydraulic Flat Tappet |
| Camshaft Gear Attachment | 1-Bolt |
| Camshaft Material | Cast Iron |
| Camshaft Series | Thumpr |
| Engine Family | Oldsmobile 260-455 c.i. 8 Cylinder (1967-1990) |
| Exhaust Duration at .050 inch Lift | 257 deg |
| Exhaust Valve Lift | 0.497 in |
| Grind Number | 295TH7 |
| Intake Duration at .050 Inch Lift | 242 deg |
| Intake Valve Lift | 0.512 in |
| K-Kit Upgrade | K42-602-5 |
| Lifter Type | Hydraulic Flat Tappet |
| Lifters Included | No |
| Lobe Separation | 107 deg |
| Usage | Street/Strip |
| Valve Springs Required | Yes |
| UPC / GTIN | 00036584213208 |
Description
Big Mutha' Thumpr 242/257 Hydraulic Flat Cam for Oldsmobile 260-455. Street/strip, needs 9.5:1 compression, 2800+ stall, intake, Gears and headers, very rough idle.
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