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Manley 221424-16

Manley NexTek Drag Race Valve Springs 1.640" O.D.


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Save $20 off $250, $40 off $500, $100 off $1,000. Promo Code: RACE2SAVE exclusions apply

Manley NexTek Drag Race Valve Springs 1.640" O.D. $283.99
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2 left in stock
NexTek Drag Race Valve Springs
  • 1.640'' O.D.
  • 0.860'' I.D.
  • 647 lbs./in. Spring Rate
  • 250 @ 2.000'' Installed
  • 800 @ 1.150'' Open
  • 0.880'' Max Valve Lift
  • 1.070'' Coil Bind
  • Double Spring (No Damper)
  • 16/pkg.
  • Manley 221424-16 Details

    1.640'' O.D. Double Valve Springs

  • Type of Spring: Double without Damper
  • Color Code: Blue Stripe
  • Installed Height and Pressure: 2.000'' @ 250 lbs./in.
  • Open Height and Pressure: 1.150'' @ 800 lbs./in.
  • Spring Rate: 647 lbs./in.
  • O.D. of Outer Spring: 1.640''
  • I.D. of Outer Spring: 1.185''
  • I.D. of Middle Spring: N/A
  • I.D. of Inner Spring: 0.860''
  • Coil Bind height: 1.070''
  • Weight: 149 grams
  • Damper Included: No

    Click Here to see 660-221424 Valve Spring Load Chart

  • Specifications:

    Coil Bind Height (in.)
    Sold as a set of 16
    Damper Spring Included
    Number of Springs Per Valve
    Valve Spring Style
    Outside Diameter of Outer Spring (in.)
    Inside Diameter of Outer Spring (in.)
    Spring Rate
    647 lbs./in.
    Inside Diameter of Inner Spring (in.)
    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.

  • Higher natural frequency provides improved valvetrain control and higher RPM potential
  • All springs are triple design springs except for 660-221424, 660-221425 & 660-221454 which are double design without damper
  • Extensively tested on the Spintron, dyno and race track (including blown nitro engines) and proven highly effective
  • Smaller diameter, lightweight dual design allows engine to rev higher with improved valve train control
  • Better valvetrain stability and component life
  • Ultra clean, high tensile strength chrome silicon steel
  • Polish Finish surface reduces friction, improves fatigue life and minimize load loss.
  • Ideal loads for multiple applications with minimal load loss

    Click Here to see Valve Springs Load Chart

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

    Motor Vehicles

    WARNING: Motor vehicles contain fuel, oils and fluids, battery posts, terminals and related accessories which contain lead and lead compounds and other chemicals known to the State of California to cause cancer, birth defects and other reproductive harm. These chemicals are found in vehicles, vehicle parts and accessories, both new and as replacements. When being serviced, these vehicles generate used oil, waste fluids, grease, fumes and particulates, all known to the State of California to cause cancer, birth defects, and reproductive harm.


    WARNING: Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Some examples of these chemicals are: lead from lead-based paints, crystalline silica from bricks and cement and other masonry products, and arsenic and chromium from chemically treated lumber. Your risk from exposure to these chemicals varies, depending on how often you do this type of work. To reduce your exposure, work in a well-ventilated area and with approved safety equipment, such as dust masks that are specially designed to filter out microscopic particles.

    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.