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COMP Cams CL33-602-5 Big Mutha' Thumpr Hydraulic Flat Camshaft and Lifter Kit

(Ford Mustang 1967-70, Thunderbird 1963-68, Galaxie 500 1963-71, Fairlane 1963-70, Torino 1968-69, Galaxie 1963-67, LTD 1965-71, Custom 1964-71 + 25 more models)

Manufacturer

Picture for manufacturer COMP Cams

Part Number

CL33-602-5
6 reviews
Sale Price

$465.95

Estimated ship date Saturday, November 21

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Product Details

The COMP Cams Big Mutha' Thumpr CL33-602-5 is a complete camshaft and lifter kit engineered specifically for Ford FE-series engines (352-428 cubic inch). This aggressive hydraulic flat tappet cam delivers a radical 242/257 duration split that produces the signature loping idle and hard-hitting torque that made the Thumpr series famous.

Key Specifications:

  • Advertised Duration: 242° Intake / 257° Exhaust
  • Duration @ .050": 224° Intake / 239° Exhaust
  • Valve Lift: .512" Intake / .539" Exhaust (with 1.6:1 rocker ratio)
  • Lobe Separation Angle: 107°
  • Hydraulic flat tappet design for Ford FE-series engines

Complete Kit Includes:

  • Camshaft with advanced Mutha' Thumpr profile
  • Hydraulic flat tappet lifters (full set)
  • Assembly lube for proper break-in
  • COMP Cams decals
  • Detailed installation instructions

The Big Mutha' Thumpr is designed for street/strip applications where maximum attitude and aggressive performance are priorities. This cam works best with aftermarket converters (2,800+ stall), headers, and performance intake systems. The wide LSA and split duration create a pronounced vacuum drop and radical sound character while delivering strong mid-range to top-end power. Recommended for compression ratios of 9.5:1 or higher with premium fuel.

Products specifications

Fits

Ford Mustang 1967-70, Thunderbird 1963-68, Galaxie 500 1963-71, Fairlane 1963-70, Torino 1968-69, Galaxie 1963-67, LTD 1965-71, Custom 1964-71, Custom 500 1964-71, Country Sedan 1963-71, Ranch Wagon 1963-71, Country Squire 1963-71 + 21 more models

Advertised Exhaust Duration

312

Advertised Intake Duration

294

Basic Operating RPM Range

2,500-6,400

Cam Type

Hydraulic Flat Tappet

Engine Family

Ford 352-428 c.i. 8 Cylinder (1963-1977)

Kit Type

Cl-Kit - Cam and Lifter Kit

Exhaust Valve Lift

0.515

Intake Valve Lift

0.531

Exhaust Duration at .050 inch Lift

257

Camshaft Material

Cast Iron

K-Kit Upgrade

K33-602-5

AMAZON ASIN

B0046ZG7YI

Assembly Lubricant Included

Yes

Camshaft Gear Attachment

1-Bolt

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.

Gaskets Included

No

Locks Included

No

Intake Duration at .050 Inch Lift

242

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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