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COMP Cams 11-601-4 Thumpr 235/249 Hydraulic Flat Cam for Chevrolet Big Block 396-454
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High performance street/strip, needs 9:1 compression, 2500+ stall, intake, gears and headers, rough idle.
Thumpr 235/249 Hydraulic Flat Cam for Chevrolet Big Block 396-454. High performance street/strip, needs 9:1 compression, 2500+ stall, intake, Gears and headers, rough idle.
Specifications
| Usage | Street/Strip |
| Camshaft Series | Thumpr |
| Exhaust Valve Lift | 0.495 IN |
| Camshaft Gear Attachment | 3 |
| Camshaft Gear Attachment | 3-Bolt |
| Advertised Exhaust Duration | 305 deg |
| Camshaft Material | Cast Iron |
| Engine Family | Chevrolet 396-454 c.i. 8 Cylinder (1967-1996) |
| Cam and Lifter Kit Upgrade | CL11-601-4 |
| Cam, Lifter and Gear Drive Upgrade | GK11-601-4 |
| Lifter Type | Hydraulic Flat Tappet |
| Intake Valve Lift | 0.51 IN |
| Lobe Separation | 107 deg |
| Basic Operating RPM Range | 2,000-5,900 RPM |
| Intake Duration at .050 Inch Lift | 235 deg |
| Exhaust Duration at .050 inch Lift | 249 deg |
| Advertised Intake Duration | 287 deg |
| Grind Number | 287TH7 |
| Cam Type | Hydraulic Flat Tappet |
| Valve Springs Required | Yes |
| Assembly Lubricant Included | Yes |
| K-Kit Upgrade | K11-601-4 |
| Lifters Included | No |
⚠️ 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
Please check the product description for the manufacturer’s application details, or ask a specialist — we’ll confirm whether it fits your vehicle before you buy.
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Shipping: Free to the USA.
Orders are processed during normal business days. Delivery dates may vary by carrier and destination.
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