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COMP Cams CL31-602-8 Big Mutha' Thumpr Hydraulic Roller Cam and Lifter Kit - 243/257

(Ford Mustang 1964-95, Thunderbird 1977-81, 1983-88, 1991-93, Maverick 1971-77, Galaxie 500 1963-72, Fairlane 1963-70, Torino 1968-74 + 44 more models)

Manufacturer

Picture for manufacturer COMP Cams

Part Number

CL31-602-8
6 reviews
Sale Price

$793.66

Estimated ship date Thursday, November 19

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Product Details

The COMP Cams Big Mutha' Thumpr CL31-602-8 is a complete hydraulic roller camshaft and lifter kit engineered for Ford small block 221-302 cubic inch engines. This aggressive camshaft delivers the signature Thumpr lope and exceptional power gains, making it ideal for street/strip applications where attitude and performance matter.

Camshaft Specifications:

  • Advertised Duration: 243° intake / 257° exhaust
  • Duration at .050": 224° intake / 234° exhaust
  • Valve Lift: .525" intake / .540" exhaust (with 1.6:1 rocker ratio)
  • Lobe Separation Angle: 109°
  • Hydraulic roller design for reduced friction and increased durability
  • Optimized for engines with upgraded valve springs and 2,000-5,800 RPM operating range

Complete Kit Includes:

  • Hydraulic roller camshaft
  • Premium hydraulic roller lifters
  • Assembly lube for proper break-in
  • Installation instructions
  • COMP Cams decals

This camshaft produces the aggressive idle sound that the Thumpr series is famous for, while delivering strong mid-range torque and top-end horsepower. The hydraulic roller design eliminates the need for break-in procedures required with flat tappet cams and provides excellent durability for street-driven vehicles. Recommended for use with aftermarket torque converter (2,400+ stall), headers, and performance intake manifold for optimal results.

Products specifications

Fits

Ford Mustang 1964-95, Thunderbird 1977-81, 1983-88, 1991-93, Maverick 1971-77, Galaxie 500 1963-72, Fairlane 1963-70, Torino 1968-74, Mustang II 1975-78, Falcon 1963-70, Galaxie 1963-67, Gran Torino 1972-74, LTD 1965-86 + 39 more models

Advertised Exhaust Duration

319

Advertised Intake Duration

299

Basic Operating RPM Range

2,500-6,200

Engine Family

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

Intake Valve Lift

0.552

Kit Type

Cl-Kit - Cam and Lifter Kit

Exhaust Valve Lift

0.537

Intake Duration at .050 Inch Lift

243

Exhaust Duration at .050 inch Lift

257

Camshaft Material

Austempered Ductile Iron

AMAZON ASIN

B005H89RGS

Assembly Lubricant Included

No

Camshaft Gear Attachment

1-Bolt

Valve Springs Required

Yes

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.

Gaskets Included

No

Locks Included

No

Lifter Type

Hydraulic Roller

Cam Type

Hydraulic Roller

Lifters Included

Yes

Retainers Included

No

Timing Chain and Gears Included

No

LOBE SEPARATION

107

Usage

Street/Strip

Valve Stem Seals Included

No

Camshaft Series

Thumpr

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