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Manley GM LS Series Super Finished H.P. Valve Springs .650 Max Lift (16 Pieces)

Manley GM LS Series Super Finished H.P. Valve Springs .650 Max Lift (16 Pieces)

$365.20 $405.78
Part no. 221438-16 In stock
Special order In stock with our distributor. Usually ships in a few business days, and we email tracking as soon as it leaves.

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From drag strips to short track and endurance circuits, the Manley NexTek® series is engineered for serious racers. NexTek® springs resist pressure loss and valve-train degradation even in the most demanding race conditions. That means more consistent spring...

Full details and fitment

The details

About this part

From drag strips to short track and endurance circuits, the Manley NexTek® series is engineered for serious racers. NexTek® springs resist pressure loss and valve-train degradation even in the most demanding race conditions. That means more consistent spring force deep into a run, reduced valve bounce, and improved overall stability for high-RPM performance. Built to outperform and outlast in real-world competition.

  • Tightly controlled open-end flatness reduces valve stem side loading
  • Manufactured from “super clean” Hi-Tensile Chrome Silicon steel
  • Proprietary multi-step heat treating minimizes load loss
  • Tip thickness designed to eliminate overload breakage
  • Shot-peened to MIL spec for max fatigue life