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COMP Cams 20-600-4 Thumpr Hydraulic Flat Tappet Camshaft Chrysler - 227/241 273-360

(Jeep Grand Cherokee 1993-98, Grand Wagoneer 1993; Dodge Durango 1998-2002, Ram 2500 1994-2002, Ram 1500 1994-2002, Dakota 1989-2002 + 134 more models)

Part of: COMP Cams Thumpr Hydraulic Flat Tappet Camshaft Ford

Other options in this family: COMP Cams 35-600-4 COMP Cams 34-600-5 COMP Cams 21-600-5 COMP Cams 92-600-5 COMP Cams 23-600-5

Manufacturer

Picture for manufacturer COMP Cams

Part Number

20-600-4
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 camshaft delivers aggressive sound and performance for street/strip Chrysler small block engines. Engineered for 273-360 cubic inch applications, this hydraulic flat tappet cam produces a distinctive choppy idle and strong mid-range power with excellent vacuum characteristics for power brake operation.

Camshaft Specifications:

  • Advertised Duration: 279°/297° (intake/exhaust)
  • Duration @ .050": 227°/241° (intake/exhaust)
  • Valve Lift: .477"/.480" (intake/exhaust with 1.5 rocker ratio)
  • Lobe Separation Angle: 107°
  • Recommended RPM Range: 1,600-5,600 RPM
  • Hydraulic flat tappet design for reliable street performance

Key Features:

  • Signature Thumpr lobe profile delivers aggressive exhaust note
  • Optimized for engines with 9.0:1 to 10.5:1 compression ratio
  • Maintains sufficient vacuum for power accessories and automatic transmissions
  • Includes camshaft installation lubricant
  • Compatible with stock or performance valve springs (verify spring pressures)
  • Designed for street machines, muscle cars, and weekend warriors

This camshaft is ideal for enthusiasts seeking maximum sound and street presence with reliable drivability. Professional installation recommended. Requires matching valve springs, lifters, and proper break-in procedure.

Products specifications

Fits

Jeep Grand Cherokee 1993-98, Grand Wagoneer 1993; Dodge Durango 1998-2002, Ram 2500 1994-2002, Ram 1500 1994-2002, Dakota 1989-2002, Charger 1966-78, Challenger 1970-74, Ram 3500 1994-2002, Dart 1964-77, 1980-82 + 130 more models

Advertised Exhaust Duration

297

Advertised Intake Duration

279

Basic Operating RPM Range

2,000-5,800

Grind Number

279TH7

Cam Type

Hydraulic Flat Tappet

Engine Family

Chrysler 273-360 c.i. 8 Cylinder (1964-2002)

Exhaust Valve Lift

0.473

Intake Valve Lift

0.486

Exhaust Duration at .050 inch Lift

241

Camshaft Material

Cast Iron

Cam and Lifter Kit Upgrade

CL20-600-4

K-Kit Upgrade

K20-600-4

AMAZON ASIN

B002EE6DEC

Usage

Street/Performance

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

227

LOBE SEPARATION

107

Camshaft Series

Thumpr

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