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COMP Cams 977-4 Dual Valve Spring 1.460 in. O.D. 441 lbs./in. Rate

(Ford F-150 1975-95, Mustang 1964-95, F-250 1975-95, Bronco 1966-95, Thunderbird 1977-81, F-350 1975-95, Maverick 1971-77, Galaxie 500 1963-74 + 105 more models)

Manufacturer

Picture for manufacturer COMP Cams

Part Number

977-4
7 reviews
Sale Price

$47.95

Estimated ship date Thursday, November 26

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Product Details

With a 1.460 in. outer diameter and a 441 lbs./in. spring rate, these springs deliver the valve train control needed for mechanical camshaft applications demanding precise pressure and stability.

These dual valve springs are manufactured from clean wire and subject to extensive quality control testing to deliver superior strength, durability, and valve train stability. The dual spring design provides a stronger assembly capable of handling increased lift in demanding, high-stress applications. An integrated damper helps suppress harmonic vibration for smooth, consistent valve operation.

Key Specifications:

  • Spring Type: Dual (double)
  • Outer Spring O.D.: 1.460 in.
  • Outer Spring I.D.: 1.060 in.
  • Inner Spring I.D.: 0.700 in.
  • Spring Rate: 441 lbs./in.
  • Installed Height: 1.850 in.
  • Seat Pressure: 155 lbs. @ 1.850 in.
  • Open Pressure: 419 lbs.
  • Open Height: 1.250 in.
  • Coil Bind Height: 1.195 in.
  • Damper: Yes
  • Camshaft Type: Mechanical

Compatible Components:

  • Compatible Retainer: COMP Cams 740-16
  • Compatible Shims: COMP Cams 4757
  • Compatible Spring Cup (O.D. Locator): COMP Cams 4704-16

The 977-4 is the 4-piece version of the COMP Cams 977 series valve spring, also available in 12-piece (977-12) and 16-piece (977-16) sets. These springs are designed as companion components to COMP Cams 972 and 973 camshaft products, ensuring a properly matched valvetrain system for maximum performance and reliability.

Products specifications

Fits

Ford F-150 1975-95, Mustang 1964-95, F-250 1975-95, Bronco 1966-95, Thunderbird 1977-81, F-350 1975-95, Maverick 1971-77, Galaxie 500 1963-74, F-100 1975-83, F-250 Pickup 1972-95, Fairlane 1963-70, Ranchero 1965-79, Torino 1968-76 + 100 more models

Spring Type

Double

Camshaft Type

Hydraulic

Coil Bind Height (in.)

1.195

Inside Diameter (in.)

0.697

Installed Height (in.)

1.85

Installed Pressure (lbs.)

155

Open Height (in.)

1.25

Open Pressure (lbs.)

419

Outside Diameter (in.)

1.460

Spring Rate (lbs./in.)

441

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Very satisfied. Good price and quick delivery.

Great prices, quick ship thanks!

Excellent service. Received the part the day after I ordered it. Best price I could find also.<br>Thanks

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