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COMP Cams GK35-601-8 Mutha' Thumpr Hydraulic Roller Camshaft Kit for Ford 351W

(Ford F-150 1981-95, Mustang 1969-95, F-250 1981-95, Bronco 1981-95, Thunderbird 1977-79, F-350 1981-95, Galaxie 500 1969-74, F-100 1981 + 37 more models)

Manufacturer

Picture for manufacturer COMP Cams

Part Number

GK35-601-8
5 reviews
Sale Price

$1,646.95

Estimated ship date Saturday, November 28

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Product Details

The COMP Cams GK35-601-8 Mutha' Thumpr is a complete hydraulic roller camshaft kit engineered specifically for Ford 351W small block engines. This aggressive cam profile delivers a 235/249 duration split that produces the signature Thumpr loping idle and hard-hitting power delivery that muscle car enthusiasts crave.

Camshaft Specifications:

  • Advertised Duration: 279°/283° intake/exhaust
  • Duration at .050": 235°/249° intake/exhaust
  • Valve Lift: .525"/.540" intake/exhaust (with 1.6:1 rocker ratio)
  • Lobe Separation Angle: 107°
  • Hydraulic roller design for reduced friction and improved durability
  • Optimized for street performance with automatic transmissions

Complete GK-Kit Includes:

  • Hydraulic roller camshaft
  • Matched valve springs and retainers
  • Chromoly pushrods
  • Assembly lubricant
  • Installation instructions

The Mutha' Thumpr series is designed for enthusiasts who want aggressive sound and street performance without sacrificing driveability. This cam works best in engines with 9.0:1 or higher compression, aftermarket intake manifolds, headers, and 2,500+ RPM stall converters. The hydraulic roller design eliminates the need for break-in procedures required with flat tappet cams while providing superior wear resistance and consistent performance.

This kit provides everything needed for a complete valve train upgrade, ensuring all components are matched and tested to work together for optimal performance and reliability.

Products specifications

Fits

Ford F-150 1981-95, Mustang 1969-95, F-250 1981-95, Bronco 1981-95, Thunderbird 1977-79, F-350 1981-95, Galaxie 500 1969-74, F-100 1981, F-250 Pickup 1981-95, Fairlane 1969, Ranchero 1969-79, Torino 1969-76, F-350 Pickup 1981-95 + 32 more models

Advertised Exhaust Duration

311

Advertised Intake Duration

291

Basic Operating RPM Range

2,200-5,900

Engine Family

Ford 351W 8 Cylinder (1969-1996)

Exhaust Valve Lift

0.526

Intake Valve Lift

0.522

Exhaust Duration at .050 inch Lift

249

Kit Type

GK-Kit - Cam and Gear Kit

K-Kit Upgrade

K35-601-8

AMAZON ASIN

B002EE74SG

Usage

Street/Performance

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

Intake Duration at .050 Inch Lift

235

Cam Type

Hydraulic Roller

Lifters Included

Yes

Retainers Included

No

Timing Chain and Gears Included

Yes

Valve Stem Seals Included

No

Pushrods Included

No

Camshaft Series

Thumpr

Title

Mutha' Thumpr 235/249 Hydraulic Roller Cam GK-Kit for Ford 351W

simply and easy check out

easy to navigate, lowest price, simple to shop.

I paid for 2nd day shipping and 5 days later they were shipped out. So, I should receive my rotors in a full week from when I paid for 2 day shipping. I called customer service and they discounted the shipping rate to ground service. At least they were polite and helpful in the phone.

great experience, good price, item arrived within 4 days of purchase, would do business with again in future !

it's my first order with you, I'll better know, when I receive my parts, then I will be happy to rate this experience. I thought I had a problem, in that I was expecting 1 box but got 2 with my parts. 1 day apart. You guys are great, quick response and f

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