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COMP Cams K11-602-8 Big Mutha' Thumpr Hydraulic Roller Camshaft K-Kit for Chevrolet Big Block 396-454

(Chevrolet Camaro 1967-72, Corvette 1967-74, Impala 1965-76, Malibu 1966-67, 1973-75, C1500 1990-93, Chevelle 1965-73, Blazer 1973-74 + 108 more models)

Manufacturer

Picture for manufacturer COMP Cams

Part Number

K11-602-8
12 reviews
Sale Price

$1,623.95

Estimated ship date Friday, November 20

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Product Details

The COMP Cams K11-602-8 Big Mutha' Thumpr hydraulic roller camshaft K-Kit is an aggressive performance upgrade designed specifically for Chevrolet Big Block 396-454 engines. This camshaft features 243/257 duration specs and delivers the signature "Thumpr" lope idle that provides a powerful street presence while maintaining excellent street manners and low-end torque.

Complete K-Kit Includes Everything You Need:

  • Hydraulic roller camshaft with 243/257 duration specifications
  • Hydraulic roller lifters engineered to match the cam profile
  • High-performance valve springs designed for increased lift
  • Spring retainers and valve locks for secure valve train operation
  • Valve stem seals to prevent oil consumption
  • Timing chain set for precise cam timing
  • Assembly lube for proper break-in
  • Installation instructions and COMP Cams decals

The Big Mutha' Thumpr series is ideal for street performance applications where you want aggressive sound and improved power output without sacrificing reliability. The hydraulic roller design reduces friction and wear compared to flat tappet cams while providing excellent valve control throughout the RPM range. This kit eliminates the guesswork by including all necessary valve train components matched specifically to work together for optimal performance.

Products specifications

Fits

Chevrolet Camaro 1967-72, Corvette 1967-74, Impala 1965-76, Malibu 1966-67, 1973-75, C1500 1990-93, Chevelle 1965-73, Blazer 1973-74, C10 Pickup 1968-80, Caprice 1966-76, C10 1975-81, El Camino 1966-75, Monte Carlo 1970-75 + 103 more models

Advertised Exhaust Duration

319

Advertised Intake Duration

299

Basic Operating RPM Range

2,500-6,100

Exhaust Valve Lift

0.554

Intake Valve Lift

0.57

Intake Duration at .050 Inch Lift

243

Exhaust Duration at .050 inch Lift

257

Camshaft Material

Austempered Ductile Iron

Kit Type

K-Kit - Complete Kit

AMAZON ASIN

B001GEYW6M

Assembly Lubricant Included

No

Prop 65

WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov

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.

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.

Gaskets Included

No

Camshaft Gear Attachment

3-Bolt

Lifter Type

Hydraulic Roller

Cam Type

Hydraulic Roller

Lifters Included

Yes

LOBE SEPARATION

107

Valve Springs Included

Yes

Usage

Street/Strip

Camshaft Series

Thumpr

Engine Family

Chevrolet 396-454 c.i. 8 Cylinder (1967-1996)

N

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