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Manley Super Finish NexTek H.P. Valve Springs 4.6/5.4L SOHC 3V

Manley 221433-24
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Estimated to ship directly from the manufacturer on 07/23/18
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Manley Super Finish NexTek H.P. Valve Springs 4.6/5.4L SOHC 3V $354.99
NexTek H.P. Valve Springs
  • 4.6/5.4L SOHC 3V
  • 1.101'' O.D.
  • 0.650'' I.D.
  • 258 lbs./in. Spring Rate
  • 110 @ 1.670'' Installed
  • 260 @ 1.090'' Open
  • 0.580'' Max Valve Lift
  • 1.020'' Coil Bind
  • Single Conical Ovate Wire
  • 24/pkg

  • Manley 221433-24 Details

    Ford 4.6L/5.4L

    Ford 4.6L, 5.4L SOHC 3-Valve stock diameter hydraulic roller applications.

  • Type of Spring: Super Finish Single Conical Ovate Wire
  • Color Code: N/A
  • Installed Height and Pressure: 1.670'' @ 110 lbs./in.
  • Open Height and Pressure: 1.090'' @ 260 lbs./in.
  • Spring Rate: 258 lbs./in.
  • O.D. of Outer Spring: 1.013'' Top / 1.101'' Bottom
  • I.D. of Outer Spring: 0.650'' Top / 0.738'' Bottom
  • I.D. of Middle Spring: N/A
  • I.D. of Inner Spring: N/A
  • Coil Bind height: 1.020''
  • Weight: 49 grams
  • Damper Included: No

    Click Here to see 660-221433 Valve Spring Load Chart

  • Specifications:

    Manufacturer's Part Number:

    NexTek Valve Springs...Better By Design!

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

  • Manufactured from ''super clean'' HiTensile Chrome Silicon steel
  • Shotpeened to MIL Specs for maximum fatigue life
  • Proprietary multistep 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
  • These Manley NexTek valve springs are available in Polished and Super Finished versions to reduce friction, improve fatigue life and minimize load loss
  • Super Finished is multi-step surface enhancement that significantly improves fatigue strength

    Click Here to see Valve Springs Load Chart

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