Account Login
Gift Cards
Track Order
Click image to zoom
Manley 221435-1
Representative Image
Product images may differ from actual product appearance.

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


made in usa
Ships directly from the manufacturer
Save $10 off $199, $45 off $499, $100 off $999. Promo Code: FALLFUN exclusions apply

Manley Polished NexTek H.P. Valve Spring GM LS-series $31.99
Out of stock
NexTek H.P. Valve Spring
  • GM LS-series
  • 1.340'' O.D.
  • 0.726'' I.D.
  • 394 lbs./in. Spring Rate
  • 170 @ 1.810'' Installed
  • 450 @ 1.110'' Open
  • 0.700'' Max Valve Lift
  • 1.050'' Coil Bind
  • Double Spring (No Damper)
  • 1/pkg.
  • Manley 221435-1 Details

    GM LS-Series

    GM LS-series high performance hydraulic roller applications

  • Type of Spring: Polished Double Coil without Damper
  • Color Code: N/A
  • Installed Height and Pressure: 1.810'' @ 170 lbs./in.
  • Open Height and Pressure: 1.110'' @ 450 lbs./in.
  • Spring Rate: 394 lbs./in.
  • O.D. of Outer Spring: 1.340''
  • I.D. of Outer Spring: 0.994''
  • I.D. of Middle Spring: N/A
  • I.D. of Inner Spring: 0.726''
  • Coil Bind height: 1.050''
  • Weight: 94 grams
  • Damper Included: No

    Click Here to see 660-221435 Valve Spring Load Chart

  • Specifications:

    Open Height (in)
    1.150 in.
    Installed Height (in)
    1.810 in.
    Open Pressure (lbs)
    450 lbs.
    Outside Diameter of Outer Spring (in)
    1.340 in.
    Coil Bind Height (in)
    1.050 in.
    Seat Pressure at Installed Height (lbs)
    170 lbs.
    Spring Rate (lbs/in)
    394 lbs./in.
    Sold individually
    Damper Spring Included
    Number of Springs Per Valve
    Manufacturer's Part Number:
    Shipping Weight:
    Package Height:
    Package Depth:
    Package Width:

    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.


    • 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

    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.