COMP Cams Big Mutha Thumpr Hydraulic Flat Tappet Camshaft Complete Kit Lift .522"/.507" Duration 295/312 RPM Range 2300 to 6200
249-K11-602-4

Items You Need
Chevy 396-454ci Big Block 1965-96
Chevelle, Camaro, Corvette, Stingray, Silverado, C10, Firebird, Chevrolet, Big Block, Chevy, BBC, 454, 427, 502, 396, Caprice, Malibu, Impala, Nova, Monte Carlo, S10, 572
Street/strip, needs 9.5:1 compression, 2800+ stall, intake, gears and headers, very rough idle.
Specifications:
Thumpr Camshafts are the hottest cams to hit the streets in more than a decade. That's because they give you the big cam sound you're looking for, without the drawbacks. Applying a camshaft design originally created for sports car endurance racing, they incorporate early exhaust valve opening, long exhaust duration, and a generous amount of intake and exhaust overlap. Best of all, Thumprs will not negatively impact power output or streetability.
Features:![]() Thumpr Sound Clip ![]() |
Camshaft & Lifter Kits are indicated by a CL in their part number and include Camshaft, Lifters, Assembly Lube, Decals, and Instructions.
Complete Kits are indicated by a K in their part number and include Camshaft, Lifters, Timing Chain & Gears, Valve Springs, Retainers, Locks, Assembly Lube, Decals, and Instructions.
Does COMP Cams K11-602-4 fit your vehicle?
1970 CHEVROLET EL CAMINO
- Liter: 7.4
- SubModel: CUSTOM
- Aspiration: NATURALLY ASPIRATED
- CUI: 454
- Engine Type: V8 ( 7.4L / 454 )
- Engine Vin: -
1970 CHEVROLET C20 PICKUP
- Liter: 6.6
- SubModel: BASE
- Aspiration: NATURALLY ASPIRATED
- CUI: 402
- Engine Type: V8 ( 6.6L / 402 )
- Engine Vin: E
1969 CHEVROLET C20 PICKUP
- Liter: 6.5
- SubModel: BASE
- Aspiration: NATURALLY ASPIRATED
- CUI: 396
- Engine Type: V8 ( 6.5L / 396 )
- Engine Vin: E
1970 CHEVROLET CHEVELLE
- Liter: 6.6
- SubModel: MALIBU
- Aspiration: NATURALLY ASPIRATED
- CUI: 400
- Engine Type: V8 ( 6.6L / 400 )
- Engine Vin: -
1972 CHEVROLET KINGSWOOD
- Liter: 6.6
- SubModel: BASE
- Aspiration: NATURALLY ASPIRATED
- CUI: 400
- Engine Type: V8 ( 6.6L / 400 )
- Engine Vin: R
1971 CHEVROLET CAPRICE
- Liter: 6.6
- SubModel: BASE
- Aspiration: NATURALLY ASPIRATED
- CUI: 402
- Engine Type: V8 ( 6.6L / 402 )
- Engine Vin: -
1966 CHEVROLET IMPALA
- Liter: 6.5
- SubModel: SS
- Aspiration: NATURALLY ASPIRATED
- CUI: 396
- Engine Type: V8 ( 6.5L / 396 )
- Engine Vin: -
1972 GMC SPRINT
- Liter: 7.4
- SubModel: CUSTOM
- Aspiration: NATURALLY ASPIRATED
- CUI: 454
- Engine Type: V8 ( 7.4L / 454 )
- Engine Vin: W
1972 GMC SPRINT
- Liter: 6.6
- SubModel: BASE
- Aspiration: NATURALLY ASPIRATED
- CUI: 402
- Engine Type: V8 ( 6.6L / 402 )
- Engine Vin: S
1971 GMC K15/K1500 SUBURBAN
- Liter: 6.6
- SubModel: BASE
- Aspiration: NATURALLY ASPIRATED
- CUI: 402
- Engine Type: V8 ( 6.6L / 402 )
- Engine Vin: K
1971 CHEVROLET CORVETTE
- Liter: 7.4
- SubModel: BASE
- Aspiration: NATURALLY ASPIRATED
- CUI: 454
- Engine Type: V8 ( 7.4L / 454 )
- Engine Vin: -
1972 CHEVROLET BISCAYNE
- Liter: 6.6
- SubModel: BASE
- Aspiration: NATURALLY ASPIRATED
- CUI: 402
- Engine Type: V8 ( 6.6L / 402 )
- Engine Vin: U
How badly would this cam effect e gine vacuum?? Could I still run power brakes
Motor Vehicles
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Electrical Cords
WARNING: The wires of these products contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling.