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COMP Cams 31-601-8 Mutha' Thumpr Hydraulic Roller Camshaft 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 + 44 more models)

Manufacturer

Picture for manufacturer COMP Cams

Part Number

31-601-8
9 reviews
Sale Price

$529.63

Estimated ship date Monday, November 23

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Product Details

The COMP Cams Mutha' Thumpr hydraulic roller camshaft is engineered to deliver an aggressive idle and maximum performance for street/strip Ford small block engines. This cam features 235/249 degrees of advertised duration and is specifically designed for 221-302 cubic inch Ford V8 engines equipped with factory roller lifter provisions.

Key Specifications:

  • Advertised Duration: 235° Intake / 249° Exhaust
  • Duration at .050": 218° Intake / 232° Exhaust
  • Valve Lift (with 1.6:1 rockers): .525" Intake / .540" Exhaust
  • Lobe Separation Angle: 107°
  • Hydraulic roller design for reduced friction and increased durability
  • Ground on 8620 steel core with induction hardened lobes

Performance Features:

  • Signature "Thumpr" lopey idle and aggressive exhaust note
  • Optimized for engines with stock to mild compression (8.5:1-9.5:1)
  • Power range: 1,800-5,600 RPM
  • Excellent vacuum characteristics for power brakes and accessories
  • Compatible with factory EFI and computer controls
  • Requires factory roller lifters and appropriate valve springs

This camshaft is ideal for enthusiasts seeking maximum street performance with that distinctive muscle car sound. The Mutha' Thumpr profile provides strong mid-range torque while maintaining excellent street manners and drivability. Recommended for use with aftermarket headers, dual exhaust, and a 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

311

Advertised Intake Duration

291

Basic Operating RPM Range

2,200-5,900

Grind Number

291THR7

Engine Family

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

Exhaust Valve Lift

0.526

Intake Valve Lift

0.54

Exhaust Duration at .050 inch Lift

249

Camshaft Material

Austempered Ductile Iron

Cam and Lifter Kit Upgrade

CL31-601-8

K-Kit Upgrade

K31-601-8

AMAZON ASIN

B0046ZEAKQ

Assembly Lubricant Included

No

Camshaft Gear Attachment

1-Bolt

Lifters Included

No

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.

Lifter Type

Hydraulic Roller

Intake Duration at .050 Inch Lift

235

Cam Type

Hydraulic Roller

LOBE SEPARATION

107

Usage

Street/Strip

Camshaft Series

Thumpr

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