COMP Cams Mutha' Thumpr 235/249 Hydraulic Roller Cam for Chevrolet Big Block 396-454 11-601-8
Specifications:
| K-Kit Upgrade | K11-601-8 |
| Lifter Type | Hydraulic Roller |
| Title | Mutha' Thumpr 235/249 Hydraulic Roller Cam for Chevrolet Big Block 396-454 |
| Amazon ASIN | B0014F35T8 |
| C.A.R.B. Exempt for Racing and Off-Road Only Vehicles? | Yes, but must be a race/competition only 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 California Certified Vehicles Manufactured Before 1965? | 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. Exemption Reason | N/A |
| C.A.R.B. E.O. Number | N/A |
| 10602 | 291THR7 |
| Camshaft Series | Thumpr |
| Usage | Street/Performance |
| Cam Type | Hydraulic Roller |
| Grind Number | 291THR7 |
| Basic Operating RPM Range | 2,200-5,800 |
| Intake Duration at .050 Inch Lift | 235 |
| Exhaust Duration at .050 inch Lift | 249 |
| Advertised Intake Duration | 291 |
| Advertised Exhaust Duration | 311 |
| Lobe Separation | 107 |
| Intake Valve Lift | 0.558 |
| Exhaust Valve Lift | 0.542 |
| Lifters Included | No |
| Valve Springs Required | Yes |
| Assembly Lubricant Included | No |
| Camshaft Gear Attachment | 3-Bolt |
| Camshaft Material | Austempered Ductile Iron |
| Engine Family | Chevrolet 396-454 c.i. 8 Cylinder (1967-1996) |
| Cam, Lifter and Gear Drive Upgrade | GK11-601-8 |
| Cam and Lifter Kit Upgrade | CL11-601-8 |
| California Proposition 65 | WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov |
| Description_KSW | Stingray |
| Description_KSW | Silverado |
| Description_KSW | C10 |
| Description_KSW | Firebird |
| Description_KSW | Chevrolet |
| Description_KSW | Big Block |
| Description_KSW | Chevy |
| Description_KSW | BBC |
| Description_KSW | 454 |
| Description_KSW | 427 |
| Description_KSW | 502 |
| Description_KSW | 396 |
| Description_KSW | Caprice |
| Description_KSW | Malibu |
| Description_KSW | Impala |
| Description_KSW | Nova |
| Description_KSW | Monte Carlo |
| Description_KSW | S10 |
| Description_KSW | 572 |
| Description_DES | Mutha' Thumpr 235/249 Hydraulic Roller Cam for Chevrolet Big Block 396-454 |
| Description_APS | Chevrolet GEN IV 396-454 Big Block Engines Originally Equipped with Flat Tappet Camshafts |
| Description_EXT | High performance street/strip |
| Description_EXT | needs 9:1 compression |
| Description_EXT | 2500+ stall |
| Description_EXT | intake |
| Description_EXT | gears and headers |
| Description_EXT | rough idle. |
| Description_MKT | Designed to deliver an aggressive |
| Description_MKT | hard-hitting exhaust note at idle |
| Description_MKT | the Thumpr camshaft series from COMP Cams also delivers excellent horsepower gains and a broad torque curve. A perfect choice for muscle cars and street rods |
| Description_MKT | the Thumpr series' early intake valve opening and long exhaust duration create optimum overlap for that race car idle. The Thumpr grinds all require an aftermarket torque converter and lower gear ratio to ensure the drivetrain always puts the engine in its powerband. Additionally |
| Description_MKT | Thumpr camshafts typically deliver reduced vacuum at idle |
| Description_MKT | making a vacuum canister |
| Description_MKT | pump or hydroboost a requirement for vehicles running power brakes. |
| Description_SHO | MT 235/249 HRlrBBC |
| Description_INV | M-Thmpr 235/249 H-Roller Cam BBC 396-454 |
| Description_KSW | Chevelle |
| Description_KSW | Camaro |
| Description_KSW | Corvette |
| Description_DEF | Engine Camshaft |