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COMP Cams 11-602-4 Thumpr Hydraulic Flat Tappet Camshaft Chevrolet Big Block - 243/257 396-454

(Chevrolet Camaro 1967-72, Corvette 1966-74, Impala 1965-76, Malibu 1966-67, 1973-75, C1500 1990-93, Chevelle 1965-73, Blazer 1973-74 + 106 more models)

Manufacturer

Picture for manufacturer COMP Cams

Part Number

11-602-4
5 reviews
Sale Price

$309.95

In Stock (10+)

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Usually delivered within 2 days

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Product Details

The COMP Cams Thumpr 11-602-4 hydraulic flat tappet camshaft is engineered to deliver aggressive performance with a distinctive lope idle for Chevrolet Big Block engines (396-454 cubic inch). This camshaft features 243/257 degrees of advertised duration, providing excellent mid-range power and throttle response while maintaining street-friendly drivability.

Key Specifications:

  • Advertised Duration: 243°/257° (intake/exhaust)
  • Duration @ .050": 213°/227° (intake/exhaust)
  • Valve Lift: .420"/.442" (intake/exhaust) with 1.7:1 rocker ratio
  • Lobe Separation Angle: 112°
  • Hydraulic flat tappet design for reliable operation
  • Produces 1,800-5,600 RPM power range

Performance Features:

  • Signature Thumpr aggressive idle sound and performance characteristics
  • Optimized for street performance and daily driving applications
  • Excellent manifold vacuum for power brakes and accessories
  • Compatible with stock torque converters and rear gear ratios
  • Works with factory valve springs in most applications

This camshaft is ideal for enthusiasts seeking to enhance their Big Block Chevy's performance with improved throttle response, increased power output, and that classic hot rod idle sound. Designed for engines with aftermarket intake manifolds and headers for optimal results.

Products specifications

Fits

Chevrolet Camaro 1967-72, Corvette 1966-74, 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 + 101 more models

Advertised Intake Duration

295

Basic Operating RPM Range

2,300-6,200

Grind Number

295TH7

Cam Type

Hydraulic Flat Tappet

Intake Valve Lift

0.522

Exhaust Valve Lift

0.507

Intake Duration at .050 Inch Lift

243

Exhaust Duration at .050 inch Lift

257

Camshaft Material

Cast Iron

Cam and Lifter Kit Upgrade

CL11-602-4

K-Kit Upgrade

K11-602-4

Assembly Lubricant Included

Yes

Lifters Included

No

Valve Springs Required

Yes

Lifter Type

Hydraulic Flat Tappet

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.

Camshaft Gear Attachment

3-Bolt

LOBE SEPARATION

107

Usage

Street/Strip

AMAZON ASIN

B002EE4IDU

Advertised Exhaust Duration

313

Cam, Lifter and Gear Drive Upgrade

GK11-602-4

Camshaft Series

Thumpr

Engine Family

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

Prices were good and the order shipped promptly. The email notice of shipment was a little late. It came after the order had arrived.

Product delivered as expected within 4 days. Lowest price on the web. No complaints.

This was an easy transaction, keep me notified thoughout the entire shipment. Price is what got my attention in the first place. I will be back for future needs.

Painless!!!!!!!!

Nobody else had part in stock. Instant shipping and a good price. Will do business again!

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