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Manley 221427-16
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Manley NexTek H.P. Valve Springs 4.6/5.4L SOHC 2V

660-221427-16

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$266.99
Manley NexTek H.P. Valve Springs 4.6/5.4L SOHC 2V $266.99
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NexTek H.P. Valve Springs
  • 4.6/5.4L SOHC 2V
  • 1.125'' O.D.
  • 0.642'' I.D.
  • 264 lbs./in. Spring Rate
  • 95 @ 1.680'' Installed
  • 240 @ 1.130'' Open
  • 0.580'' Max Valve Lift
  • 1.080'' Coil Bind
  • Single Conical Ovate Wire
  • 16/pkg.
  • Manley 221427-16 Details

    Ford 4.6L/5.4L

    Ford 4.6L, 5.4L SOHC 2-Valve stock diameter hydraulic roller applications.

  • Type of Spring: Single Conical Ovate Wire
  • Color Code: Gold
  • Installed Height and Pressure: 1.680'' @ 95 lbs./in.
  • Open Height and Pressure: 1.130'' @ 240 lbs./in.
  • Spring Rate: 264 lbs./in.
  • O.D. of Outer Spring: 1.020'' Top / 1.125'' Bottom
  • I.D. of Outer Spring: 0.642'' Top / 0.748'' Bottom
  • I.D. of Middle Spring: N/A
  • I.D. of Inner Spring: N/A
  • Coil Bind height: 1.080''
  • Weight: 52 grams
  • Damper Included: No

    Click Here to see 660-221427 Valve Spring Load Chart

  • Specifications:

    Manufacturer's Part Number:
    221427-16

    Better By Design

    Manley NexTek (Next Generation) Valve Springs were developed over a decade ago and still offer unequaled performance. These durable springs are able to satisfy the demands of top-level engine builders who need the absolute highest-quality valve springs available. Manley Nextek springs can be found in drag race applications ranging from Bracket racers to Top Fuel, oval track engines across the country, and muscle cars on the street and strip.

    Features:

    • Manufactured from HiTensile Chrome Silicon steel
    • Shotpeened to MIL Specs for maximum fatigue life
    • Proprietary multi-step heat treating minimizes load loss
    • Tightly controlled open end flatness reduces valve stem side loading
    • Tip thickness designed to eliminate overload breakage
    • Specially processed premium-grade chrome silicon that is virtually free of impurities or surface irregularities
    • Available in Polished and Super Finished versions to reduce friction, improve fatigue life and minimize load loss
    • Super Finished is a multi-step surface enhancement that significantly improves fatigue strength

      Click Here to see Valve Springs Load Chart

    Items You Need

    Some parts are not legal for use in California or other states with similar laws / regulations

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