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COMP Cams 10-603-5 Mutha' Thumpr Hydraulic Flat Tappet Camshaft for AMC 290-401

(Jeep Cherokee 1974-83, CJ7 1976-81, CJ5 1971-81, Grand Wagoneer 1984-91, J10 1974-88, Wagoneer 1972-83, J20 1974-88, Commando 1972-73 + 27 more models)

Manufacturer

Picture for manufacturer COMP Cams

Part Number

10-603-5
7 reviews
Sale Price

$325.95

In Stock (10+)

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Usually delivered within 2 days

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Product Details

The COMP Cams Mutha' Thumpr camshaft is engineered to deliver maximum performance and that aggressive lope sound enthusiasts crave. Designed specifically for AMC 290-401 cubic inch V8 engines, this hydraulic flat tappet camshaft features a 235/249 duration split that creates a radical idle with excellent low-end torque and mid-range power.

Camshaft Specifications:

  • Advertised Duration: 286?/300? intake/exhaust
  • Duration @ .050": 235?/249? intake/exhaust
  • Valve Lift: .495"/.513" intake/exhaust (with 1.6:1 rocker ratio)
  • Lobe Separation Angle: 107?
  • Hydraulic flat tappet design for reliable street performance
  • Optimized for engines with 9.0:1 to 10.5:1 compression ratio
  • Recommended RPM range: 1,500-5,800 RPM

Key Features:

  • Signature Mutha' Thumpr profile delivers aggressive sound and performance
  • Excellent for street machines, hot rods, and muscle car builds
  • Designed to work with stock or aftermarket valve springs and cylinder heads
  • Perfect balance of idle quality, power output, and streetability
  • Compatible with stock computer and emissions equipment on most applications

This camshaft is ideal for enthusiasts looking to upgrade their AMC engine with a performance cam that offers strong throttle response, enhanced torque delivery, and that unmistakable lopey idle. Best results achieved when combined with matching COMP Cams valve springs, lifters, and timing set.

Products specifications

Fits

Jeep Cherokee 1974-83, CJ7 1976-81, CJ5 1971-81, Grand Wagoneer 1984-91, J10 1974-88, Wagoneer 1972-83, J20 1974-88, Commando 1972-73, CJ6 1971-75, J-100 1971-73, J-2500 1970-73, J-4600 1971-73, J-4500 1971-73, J-4800 1971-73 + 21 more models

Advertised Exhaust Duration

304

Basic Operating RPM Range

2,200-6,100

Grind Number

287TH7

Cam Type

Hydraulic Flat Tappet

Engine Family

American Motors 290-401 c.i. 8 Cylinder (1966-1991)

Exhaust Valve Lift

0.486

Exhaust Duration at .050 inch Lift

249

Camshaft Material

Cast Iron

Cam and Lifter Kit Upgrade

CL10-603-5

K-Kit Upgrade

K10-603-5

Assembly Lubricant Included

Yes

Camshaft Gear Attachment

1-Bolt

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.

Intake Duration at .050 Inch Lift

235

Intake Valve Lift

0.5

LOBE SEPARATION

107

Usage

Street/Strip

AMAZON ASIN

B005H89S94

Advertised Intake Duration

287

Camshaft Series

Thumpr

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