Includes valve springs, base washers, and retainers

Required with Stage 2 and stroker Raptor cams

  • Exhaust Spring Coil Bind 17.780mm
  • Exhaust Spring Installed Force 55lb
  • Exhaust Spring Installed Height 30.607mm
  • Exhaust Spring Maximum Lift 11.430mm
  • Exhaust Spring Open Force 145lb
  • Exhaust Spring Open Height 8.763mm
  • Exhaust Spring Rate 270in-lb
  • Intake Spring Coil Bind 17.780mm
  • Intake Spring Installed Force 55mm
  • Intake Spring Installed Height 30.607mm
  • Intake Spring Maximum Lift 11.430mm
  • Intake Spring Open Force 145mm
  • Intake Spring Open Height 8.763mm
  • Intake Spring Rate 270in-lb

(H-SKYFM660S2)

SKU H-SKYFM660S2
Brand Hot Rods
Unit Of Measure each

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