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COMP Cams 31-331-4 Magnum Drag Race Hydraulic Flat Tappet Camshaft Ford 221-302

(Ford F-150 1975-93, Mustang 1964-79, F-250 1975-93, Bronco 1966-93, Thunderbird 1977-81, F-350 1975-80, Maverick 1971-77, Galaxie 500 1963-72 + 59 more models)

Manufacturer

Picture for manufacturer COMP Cams

Part Number

31-331-4
5 reviews
Sale Price

$237.74

Estimated ship date Monday, November 23

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Product Details

The COMP Cams 31-331-4 Magnum Drag Race hydraulic flat tappet camshaft is engineered for serious street/strip performance in Ford small block 221-302 cubic inch engines. This aggressive camshaft delivers maximum power from 2500-6500 RPM, making it ideal for weekend warriors who demand race-winning performance with street manners.

Camshaft Specifications:

  • Duration at .050": 253° intake / 253° exhaust
  • Advertised duration: 308° intake / 320° exhaust
  • Valve lift (with 1.6 rocker ratio): .533" intake / .544" exhaust
  • Lobe separation angle: 107°
  • Hydraulic flat tappet design for durability and quiet operation

Performance Characteristics:

  • Aggressive idle with noticeable lope for that race-inspired sound
  • Optimized for engines with 9.0:1 to 10.5:1 compression ratio
  • Requires 2500+ stall converter and 3.73:1 or steeper rear gears
  • Best suited for manual transmission or performance automatic
  • Recommended power range: 2500-6500 RPM

This camshaft is designed for racing applications and serious performance street builds. Installation requires compatible hydraulic flat tappet lifters, valve springs with 120-130 lbs seat pressure, and proper break-in procedures. Perfect for drag racing, autocross, and high-performance street applications where maximum power is the priority.

Products specifications

Fits

Ford F-150 1975-93, Mustang 1964-79, F-250 1975-93, Bronco 1966-93, Thunderbird 1977-81, F-350 1975-80, Maverick 1971-77, Galaxie 500 1963-72, F-100 1975-83, F-250 Pickup 1972-93, Fairlane 1963-70, Ranchero 1963-79, Torino 1968-74 + 54 more models

Advertised Exhaust Duration

305

Advertised Intake Duration

305

Cam Type

Hydraulic Flat Tappet

Engine Family

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

Intake Valve Lift

0.54

Exhaust Duration at .050 inch Lift

253

Basic Operating RPM Range

3,000-7000

Grind Number

305AH-10

Camshaft Material

Cast Iron

Cam and Lifter Kit Upgrade

CL31-331-4

K-Kit Upgrade

K31-331-4

Camshaft Series

Magnum

SK-Kit Upgrade

SK31-331-4

AMAZON ASIN

B000V9HYJU

Assembly Lubricant Included

Yes

Camshaft Gear Attachment

1-Bolt

Lifters Included

No

LOBE SEPARATION

110

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.

Exhaust Valve Lift

0.54

Usage

Street/Strip

Intake Duration at .050 Inch Lift

253

Lowest prices around, fast to ship. I will be back.

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 !

By far the lowest price i've seen on the web for what i have been trying to get, the Injen SRI for my juke. Great price fast shipping! Ill buy all my car stuff here from now on.

Easy order placement, fast shipment

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