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Polished NexTek H.P. Valve Springs GM LS-series
InfoVehicle Info Needed
MANLEYPART NUMBER: 660-221421-16

Polished NexTek H.P. Valve Springs GM LS-series

$43378
ShippingShips on 09/30/2026
Lowest PriceLowest Price Guarantee

GM LS-Series
    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.

    GM LS-series high performance hydraulic roller applications

  • Type of Spring: Polished Double Coil without Damper
  • Color Code: N/A
  • Installed Height and Pressure: 1.800' @ 165 lbs./in.
  • Open Height and Pressure: 1.000' @ 515 lbs./in.
  • Spring Rate: 435 lbs./in.
  • O.D. of Outer Spring: 1.324'
  • I.D. of Outer Spring: 0.920'
  • I.D. of Middle Spring: N/A
  • I.D. of Inner Spring: 0.676'
  • Coil Bind height: 0.900'
  • Weight: 90 grams
  • Damper Included: No

    Click Here to see 660-221421 Valve Spring Load Chart
Part TypeValve Spring
BrandMANLEY
Package Height3.8
Package Width3.9
Package Length15.4
Weight3.63 PG
Part CategoryPerformance Parts
Part FitmentSemi Universal
Vendor Part Number221421-16
Package Qty1
Package TypeEA
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