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COMP Cams 12-602-4 Big Mutha' Thumpr 243/257 Hydraulic Flat Cam for Chevrolet Small Block
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Street/strip, needs 9.5:1 compression, 2800+ stall, intake, gears and headers, very rough idle.
Big Mutha' Thumpr 243/257 Hydraulic Flat Cam for Chevrolet Small Block 262-400. Street/strip, needs 9.5:1 compression, 2800+ stall, intake Gears and headers, very rough idle.
Specifications
| Advertised Exhaust Duration | 313 DD |
| Camshaft Material | Cast Iron |
| Engine Family | Chevrolet 262-400 c.i. 8 Cylinder (1958-1998) |
| Cam, Lifter and Gear Drive Upgrade | GK12-602-4 |
| Cam and Lifter Kit Upgrade | CL12-602-4 |
| K-Kit Upgrade | K12-602-4 |
| Lifter Type | Hydraulic Flat Tappet |
| Camshaft Series | Thumpr |
| Usage | Street/Strip |
| Cam Type | Hydraulic Flat Tappet |
| Grind Number | 295TH7 |
| Basic Operating RPM Range | 2,500-6,400 R3 |
| Intake Duration at .050 Inch Lift | 243 DD |
| Exhaust Duration at .050 inch Lift | 257 DD |
| Advertised Intake Duration | 295 DD |
| Lobe Separation | 107 DD |
| Intake Valve Lift | 0.5 IN |
| Exhaust Valve Lift | 0.486 IN |
| Lifters Included | No |
| Valve Springs Required | Yes |
| Assembly Lubricant Included | Yes |
| Camshaft Gear Attachment | 3-Bolt |
| Grind Number | 295TH7 |
⚠️ California Proposition 65 Warning
California Residents: This product can expose you to chemicals which are known to the State of California to cause cancer or other reproductive harm. Please visit www.p65warnings.ca.gov for more information.
Warranty: 12 Months
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