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Manley NexTek High Performance Valve Springs


Manley
Manley NexTek High Performance Valve Springs

Product images may differ from actual product appearance.

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.

Features:
  • 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


  • 25 Products
    GM LS-Series

    660-221428-1
    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.
  • $18.99
    Order Today Ships 09/08/15

    660-221428-16
    NexTek H.P. Valve Springs
  • 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
  • 16/pkg.
  • $246.99
    Order Today Ships 09/08/15

    660-221438-1
    Super Finished NexTek H.P. Valve Spring
  • GM LS-series
  • 1.311'' O.D.
  • 0.650'' I.D.
  • 353 lbs./in. Spring Rate
  • 150 @ 1.800'' Installed
  • 375 @ 1.150'' Open
  • 0.650'' Max Valve Lift
  • 1.100'' Coil Bind
  • Single Conical Ovate Wire
  • 1/pkg.
  • $22.99
    Order Today Ships 09/08/15

    660-221438-16
    Super Finished NexTek H.P. Valve Springs
  • GM LS-series
  • 1.311'' O.D.
  • 0.650'' I.D.
  • 353 lbs./in. Spring Rate
  • 150 @ 1.800'' Installed
  • 375 @ 1.150'' Open
  • 0.650'' Max Valve Lift
  • 1.100'' Coil Bind
  • Single Conical Ovate Wire
  • 16/pkg.
  • $299.99
    Order Today Ships 09/08/15

    660-221436-1
    Polished NexTek H.P. Valve Spring
  • GM LS-series
  • 1.295'' O.D.
  • 0.676'' I.D.
  • 379 lbs./in. Spring Rate
  • 155 @ 1.810'' Installed
  • 405 @ 1.150'' Open
  • 0.660'' Max Valve Lift
  • 1.100'' Coil Bind
  • Double Spring (No Damper)
  • 1/pkg.
  • $17.99
    Order Today Ships 09/08/15

    660-221436-16
    Polished NexTek H.P. Valve Springs
  • GM LS-series
  • 1.295'' O.D.
  • 0.676'' I.D.
  • 379 lbs./in. Spring Rate
  • 155 @ 1.810'' Installed
  • 405 @ 1.150'' Open
  • 0.660'' Max Valve Lift
  • 1.100'' Coil Bind
  • Double Spring (No Damper)
  • 16/pkg.
  • $236.99
    Order Today Ships 09/08/15

    660-221435-1
    Polished 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.
  • $26.99
    Order Today Ships 09/08/15

    660-221435-16
    Polished NexTek H.P. Valve Springs
  • 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)
  • 16/pkg.
  • $352.99
    Order Today Ships 09/08/15

    660-221421-1
    Polished NexTek H.P. Valve Spring
  • GM LS-series
  • 1.324'' O.D.
  • 0.676'' I.D.
  • 435 lbs./in. Spring Rate
  • 165 @ 1.800'' Installed
  • 515 @ 1.000'' Open
  • 0.800'' Max Valve Lift
  • 0.900'' Coil Bind
  • Double Spring (No Damper)
  • 1/pkg.
  • $22.99
    Order Today Ships 09/08/15

    660-221421-16
    Polished NexTek H.P. Valve Springs
  • GM LS-series
  • 1.324'' O.D.
  • 0.676'' I.D.
  • 435 lbs./in. Spring Rate
  • 165 @ 1.800'' Installed
  • 515 @ 1.000'' Open
  • 0.800'' Max Valve Lift
  • 0.900'' Coil Bind
  • Double Spring (No Damper)
  • 16/pkg.
  • $352.99
    Order Today Ships 09/08/15

    660-221422-1
    Super Finished NexTek H.P. Valve Spring
  • GM LS-series
  • 1.335'' O.D.
  • 0.622'' I.D.
  • 780 lbs./in. Spring Rate
  • 270 @ 1.800'' Installed
  • 870 @ 1.020'' Open
  • 0.780'' Max Valve Lift
  • 0.960'' Coil Bind
  • Double Spring (No Damper)
  • 1/pkg.
  • $32.99
    Order Today Ships 09/08/15

    660-221422-16
    Super Finished NexTek H.P. Valve Springs
  • GM LS-series
  • 1.335'' O.D.
  • 0.622'' I.D.
  • 780 lbs./in. Spring Rate
  • 270 @ 1.800'' Installed
  • 870 @ 1.020'' Open
  • 0.780'' Max Valve Lift
  • 0.960'' Coil Bind
  • Double Spring (No Damper)
  • 16/pkg.
  • $504.99
    Order Today Ships 09/08/15
    Chrysler 5.7L/6.1L HEMI

    660-221431-1
    Super Finished NexTek H.P. Valve Spring
  • 5.7/6.1L HEMI
  • 1.311'' O.D.
  • 0.650'' I.D.
  • 353 lbs./in. Spring Rate
  • 145 @ 1.811'' Installed
  • 370 @ 1.161'' Open
  • 0.650'' Max Valve Lift
  • 1.100'' Coil Bind
  • Single Conical Ovate Wire
  • 1/pkg.
  • $21.99
    Order Today Ships 09/08/15

    660-221431-16
    Super Finished NexTek H.P. Valve Springs
  • 5.7/6.1L HEMI
  • 1.311'' O.D.
  • 0.650'' I.D.
  • 353 lbs./in. Spring Rate
  • 145 @ 1.811'' Installed
  • 370 @ 1.161'' Open
  • 0.650'' Max Valve Lift
  • 1.100'' Coil Bind
  • Single Conical Ovate Wire
  • 16/pkg.
  • $333.99
    Order Today Ships 09/08/15

    660-221431X-1
    Super Finished NexTek H.P. Valve Spring
  • HEMI Drag Pak
  • 1.311'' O.D.
  • 0.650'' I.D.
  • 353 lbs./in. Spring Rate
  • 145 @ 1.811'' Installed
  • 370 @ 1.161'' Open
  • 0.650'' Max Valve Lift
  • 1.100'' Coil Bind
  • Single Conical Ovate Wire
  • 1/pkg.
  • $19.99
    Order Today Ships 09/08/15

    660-221431X-16
    Super Finished NexTek H.P. Valve Springs
  • HEMI Drag Pak
  • 1.311'' O.D.
  • 0.650'' I.D.
  • 353 lbs./in. Spring Rate
  • 145 @ 1.811'' Installed
  • 370 @ 1.161'' Open
  • 0.650'' Max Valve Lift
  • 1.100'' Coil Bind
  • Single Conical Ovate Wire
  • 16/pkg.
  • $296.99
    Order Today Ships 09/08/15
    Ford 4.6L/5.4L

    660-221427-1
    NexTek H.P. Valve Spring
  • 4.6/5.4L SOHC 2V
  • 1.125'' O.D.
  • 0.642'' I.D.
  • 264 lbs./in. Spring Rate
  • 95 @ 1.680'' Installed
  • 240 @ 1.130'' Open
  • 0.580'' Max Valve Lift
  • 1.080'' Coil Bind
  • Single Conical Ovate Wire
  • 1/pkg.
  • $20.99
    Order Today Ships 09/08/15

    660-221427-16
    NexTek H.P. Valve Springs
  • 4.6/5.4L SOHC 2V
  • 1.125'' O.D.
  • 0.642'' I.D.
  • 264 lbs./in. Spring Rate
  • 95 @ 1.680'' Installed
  • 240 @ 1.130'' Open
  • 0.580'' Max Valve Lift
  • 1.080'' Coil Bind
  • Single Conical Ovate Wire
  • 16/pkg.
  • $280.99
    Order Today Ships 09/08/15

    660-221437-1
    NexTek H.P. Valve Spring
  • 4.6/5.4L SOHC 2V
  • 1.175'' O.D.
  • 0.642'' I.D.
  • 255 lbs./in. Spring Rate
  • 125 @ 1.680'' Installed
  • 265 @ 1.130'' Open
  • 0.580'' Max Valve Lift
  • 1.080'' Coil Bind
  • Single Conical Ovate Wire
  • 1/pkg.
  • $19.99
    Order Today Ships 09/08/15

    660-221437-16
    NexTek H.P. Valve Springs
  • 4.6/5.4L SOHC 2V
  • 1.175'' O.D.
  • 0.642'' I.D.
  • 255 lbs./in. Spring Rate
  • 125 @ 1.680'' Installed
  • 265 @ 1.130'' Open
  • 0.580'' Max Valve Lift
  • 1.080'' Coil Bind
  • Single Conical Ovate Wire
  • 16/pkg.
  • $296.99
    Order Today Ships 09/08/15

    660-221433-1
    Super Finish NexTek H.P. Valve Spring
  • 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
  • 1/pkg.
  • $14.99
    Order Today Ships 09/08/15

    660-221433-24
    Super Finish 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
  • $349.99
    Order Today Ships 09/08/15

    660-221434-1
    NexTek H.P. Valve Spring
  • 4.6/5.4L DOHC 4V
  • 1.126'' O.D.
  • 0.640'' I.D.
  • 330 lbs./in. Spring Rate
  • 95 @ 1.420'' Installed
  • 270 @ 0.895'' Open
  • 0.525'' Max Valve Lift
  • 0.860'' Coil Bind
  • Single Conical Ovate Wire
  • 1/pkg.
  • $16.99
    Order Today Ships 09/08/15

    660-221434-32
    NexTek H.P. Valve Springs
  • 4.6/5.4L DOHC 4V
  • 1.126'' O.D.
  • 0.640'' I.D.
  • 330 lbs./in. Spring Rate
  • 95 @ 1.420'' Installed
  • 270 @ 0.895'' Open
  • 0.525'' Max Valve Lift
  • 0.860'' Coil Bind
  • Single Conical Ovate Wire
  • 32/pkg.
  • $529.99
    Order Today Ships 09/08/15

    660-221429-24
    Polished NexTek H.P. Valve Springs
  • 4.6/5.4L SOHC 3V
  • 1.025'' O.D.
  • 0.565'' I.D.
  • 95 @ 1.670'' Installed
  • 230 @ 1.170'' Open
  • 1.100'' Coil Bind
  • Single Conical Ovate Wire
  • 24/pkg.
  • $335.99
    Order Today Ships 09/08/15

    25 Products