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COMP Cams CL31-603-5 Big Mutha' Thumpr Hydraulic Flat Cam and Lifter Kit for Ford - 221-302

(Ford Mustang 1964-95, Thunderbird 1977-81, 1983-88, 1991-93, Maverick 1971-77, Galaxie 500 1963-72, Fairlane 1963-70, Torino 1968-74 + 40 more models)

Manufacturer

Picture for manufacturer COMP Cams

Part Number

CL31-603-5
8 reviews
Sale Price

$448.95

Estimated ship date Saturday, November 21

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Product Details

The COMP Cams Big Mutha' Thumpr CL31-603-5 is a high-performance hydraulic flat tappet camshaft and lifter kit engineered for Ford small block 221-302 cubic inch engines. This aggressive cam delivers a distinctive lope at idle and strong mid-range to top-end power, making it ideal for street/strip applications where maximum performance and attitude are desired.

Camshaft Specifications:

  • Advertised Duration: 243°/257° (Intake/Exhaust)
  • Duration @ .050": 224°/234° (Intake/Exhaust)
  • Valve Lift: .525"/.540" (Intake/Exhaust) with 1.6:1 rocker ratio
  • Lobe Separation Angle: 107°
  • Hydraulic flat tappet design for simplified valvetrain maintenance

Complete Kit Includes:

  • Hydraulic flat tappet camshaft
  • Assembly lube for proper break-in
  • COMP Cams decals
  • Detailed installation instructions

This cam produces a rough idle (1,500-5,400 RPM operating range recommended) and requires aftermarket converter and headers for optimal performance. The Big Mutha' Thumpr series is designed for enthusiasts who want aggressive sound and performance in carbureted applications. Not recommended for vehicles with stock exhaust systems or computer-controlled fuel injection.

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 1964-70, Galaxie 1963-67, Gran Torino 1972-74, LTD 1965-86 + 35 more models

Engine Family

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

AMAZON ASIN

B005H89RH2

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

Lifters Included

Yes

Retainers Included

No

Timing Chain and Gears Included

No

Valve Stem Seals Included

No

Camshaft Series

Thumpr

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