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COMP Cams CL31-600-8 Thumpr 227/241 Hydraulic Roller Cam and Lifter Kit

Manufacturer

Picture for manufacturer COMP Cams

Part Number

CL31-600-8
4 reviews
Sale Price

$836.04

Estimated ship date Monday, October 19

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Product Details

The COMP Cams CL31-600-8 Thumpr Hydraulic Roller Camshaft and Lifter Kit delivers aggressive sound and performance for Ford 221-302 small block engines. This complete kit features a 227/241 duration camshaft engineered to produce the distinctive Thumpr idle with excellent mid-range torque and horsepower gains.

Key Features:

  • Hydraulic roller camshaft with 227?/241? advertised duration for aggressive sound and performance
  • Designed specifically for Ford 221-302 cubic inch small block engines
  • Includes premium hydraulic roller lifters engineered for durability and consistent valve control
  • Complete kit includes camshaft, lifters, assembly lube, installation instructions, and COMP Cams decals
  • Thumpr profile delivers choppy idle, strong mid-range power, and excellent throttle response
  • Hydraulic roller design reduces friction and wear compared to flat tappet cams

The Thumpr series is ideal for street performance applications where you want noticeable sound and power improvements. This kit provides everything needed for camshaft installation except pushrods and timing set, which should be selected based on your specific engine configuration.

Products specifications

Advertised Exhaust Duration

303

Basic Operating RPM Range

1,900-5,600

Engine Family

Ford 221, 260, 289, 302 c.i. 8 Cylinder (1963-1995)

Kit Type

Cl-Kit - Cam and Lifter Kit

Exhaust Valve Lift

0.515

Intake Valve Lift

0.531

Exhaust Duration at .050 inch Lift

241

Camshaft Material

Austempered Ductile Iron

AMAZON ASIN

B0046ZHKJE

Usage

Street/Performance

Assembly Lubricant Included

No

Camshaft Gear Attachment

1-Bolt

Valve Springs Required

Yes

California Proposition 65

WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov

C.A.R.B. E.O. Number

N/A

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. Exemption Reason

N/A

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

Locks Included

No

Lifter Type

Hydraulic Roller

Intake Duration at .050 Inch Lift

227

Cam Type

Hydraulic Roller

Lifters Included

Yes

Retainers Included

No

Timing Chain and Gears Included

No

LOBE SEPARATION

107

Advertised Intake Duration

283

Valve Stem Seals Included

No

Camshaft Series

Thumpr

They had the lowest price on the web and carried the part I needed. They used amazon. Heck out so it was super easy to place the order and the part shipped right away. Will definitely order from again.

Easy!

Great service. Quick shipping!

fast

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