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COMP Cams 11-601-4 Thumpr Hydraulic Flat Tappet Camshaft Chevrolet Big Block - 235/249 396-454

(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

11-601-4
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 11-601-4 hydraulic flat tappet camshaft is engineered for big block Chevrolet engines (396-454 cubic inches) seeking an aggressive idle with strong mid-range performance. This camshaft delivers the signature Thumpr choppy idle sound while maintaining excellent street manners and reliability with hydraulic lifters.

Camshaft Specifications:

  • Advertised Duration: 235° Intake / 249° Exhaust
  • Duration at .050": 218° Intake / 232° Exhaust
  • Valve Lift: .462" Intake / .470" Exhaust (with 1.7 rocker ratio)
  • Lobe Separation Angle: 112°
  • Hydraulic flat tappet design for easy maintenance
  • Recommended RPM Range: 1,500-5,800 RPM
  • Requires compatible valve springs and upgraded valvetrain components

Performance Characteristics:

  • Aggressive loping idle with pronounced exhaust note
  • Strong torque delivery from 2,000-5,500 RPM
  • Excellent throttle response for street/strip applications
  • Compatible with stock or aftermarket cylinder heads
  • Works with stock or mildly modified compression ratios (9.0:1 to 10.5:1)

This camshaft is ideal for street rods, muscle car restorations, and weekend cruisers where maximum sound and performance are priorities. Professional installation and proper valvetrain setup are recommended to ensure optimal performance and longevity. Includes COMP Cams assembly lubricant packet for initial installation.

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 Exhaust Duration

305

Basic Operating RPM Range

2,000-5,900

Grind Number

287TH7

Cam Type

Hydraulic Flat Tappet

Intake Valve Lift

0.51

Exhaust Duration at .050 inch Lift

249

Camshaft Material

Cast Iron

Cam and Lifter Kit Upgrade

CL11-601-4

K-Kit Upgrade

K11-601-4

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

Exhaust Valve Lift

0.495

Intake Duration at .050 Inch Lift

235

LOBE SEPARATION

107

Usage

Street/Strip

AMAZON ASIN

B002EE492K

Cam, Lifter and Gear Drive Upgrade

GK11-601-4

Advertised Intake Duration

287

Camshaft Series

Thumpr

Engine Family

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

nice thanks

I paid for 2nd day shipping and 5 days later they were shipped out. So, I should receive my rotors in a full week from when I paid for 2 day shipping. I called customer service and they discounted the shipping rate to ground service. At least they were polite and helpful in the phone.

great experience, good price, item arrived within 4 days of purchase, would do business with again in future !

By far the lowest price i've seen on the web for what i have been trying to get, the Injen SRI for my juke. Great price fast shipping! Ill buy all my car stuff here from now on.

Easy order placement, fast shipment

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