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Manley 221443-1

NexTek Oval Track/Endurance Valve Spring 1.580" O.D.

Manley 221443-1

660-221443-1

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Manley 221443-1 NexTek Oval Track/Endurance Valve Spring 1.580" O.D. $31.99
NexTek Oval Track/Endurance Valve Spring
  • 1.580'' O.D.
  • 0.832'' I.D.
  • 535 lbs./in. Spring Rate
  • 235 @ 1.950'' Installed
  • 610 @ 1.250'' Open
  • 0.730'' Max Valve Lift
  • 1.170'' Coil Bind
  • Double Spring (No Damper)
  • 1/pkg.

  • Manley 221443-1 Details

    1.580'' O.D. Double Valve Springs

  • Type of Spring: Double Coil without Damper
  • Color Code: White Stripe
  • Installed Height and Pressure: 1.950'' @ 235 lbs./in.
  • Open Height and Pressure: 1.250'' @ 610 lbs./in.
  • Spring Rate: 535 lbs./in.
  • O.D. of Outer Spring: 1.580''
  • I.D. of Outer Spring: 1.147''
  • I.D. of Inner Spring: 0.832''
  • Coil Bind height: 1.170''
  • Weight: 150 grams
  • Damper Included: No

    Click Here to see 660-221443 Valve Spring Load Chart

  • Specifications:

    Manufacturer's Part Number:
    221443-1

    NexTek Valve Springs...Better By Design!

    Manley's NexTek valve springs are the latest in valve spring technology. The main benefit of the NexTek springs is that they resist degradation of spring pressure in the later stages of a race. This is critical in oval track racing, where an engines valve train is abused for a long period of time. The spring inside diameter is chamfered for retainer clearance. The state-of-the-art winding process, thermal treatment and finishing practices cannot be duplicated, making these springs unique. The specially processed premium-grade chrome silicon is virtually free of impurities or surface irregularities, making for a high-quality, high-performance valve spring. NexTek Series valve springs have been tested by leading engine builders and are confirmed to be the best performing valve springs on the market today!

    Features:
  • No degradation of spring pressure in the later stages of a race
  • 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
  • No degradation of spring pressure in the later stages of a race
  • Specially processed premium-grade chrome silicon that is virtually free of impurities or surface irregularities
  • NexTek Series valve springs have been tested by leading engine builders and are confirmed to be the best performing valve springs on the market today
  • 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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