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Manley NexTek H.P. Valve Spring GM LS-series

Manley 221428-1


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Manley NexTek H.P. Valve Spring GM LS-series $15.99
NexTek H.P. Valve Spring
  • GM LS-series
  • 1.311'' O.D.
  • 0.650'' I.D.
  • 341 lbs./in. Spring Rate
  • 150 @ 1.800'' Installed
  • 355 @ 1.200'' Open
  • 0.600'' Max Valve Lift
  • 1.085'' Coil Bind
  • Single Conical Ovate Wire
  • 1/pkg.

  • Manley 221428-1 Details

    GM LS-Series

    GM LS-series, LT-1 / LT-4 / L-98 high performance hydraulic roller applications

  • Type of Spring: Single Conical Ovate Wire
  • Color Code: N/A
  • Installed Height and Pressure: 1.800'' @ 150 lbs./in.
  • Open Height and Pressure: 1.200'' @ 355 lbs./in.
  • Spring Rate: 341 lbs./in.
  • O.D. of Outer Spring: 1.076'' Top / 1.311'' Bottom
  • I.D. of Outer Spring: 0.650'' Top / 0.885'' Bottom
  • I.D. of Middle Spring: N/A
  • I.D. of Inner Spring: N/A
  • Coil Bind height: 1.085''
  • Weight: 79 grams
  • Damper Included: No

    Click Here to see 660-221428 Valve Spring Load Chart

  • Specifications:

    Installed Height (in)
    1.800 in.
    Open Height (in)
    1.200 in.
    Open Pressure (lbs)
    355 lbs.
    Seat Pressure at Installed Height (lbs)
    150 lbs.
    Coil Bind Height (in)
    1.085 in.
    Spring Rate (lbs/in)
    341 lbs./in.
    Valve Spring Style
    Conical ovate wire
    Sold individually
    Manufacturer's Part Number:
    Shipping Weight:
    Package Height:
    Package Depth:
    Package Width:

    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

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

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    Electrical Cords

    WARNING: The wires of these products contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling.