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180lb Dual Valve Springs

$8.00 (Fixed shipping cost)

Product Description

These are not drop in, they require machine work. Refer to pictures for machine work required.


12v Dual Valve Springs


  • 180lb seat pressure dual valve springs
  • 10° Billet Retainers
  • Correct Cummins valve locks (not the cheap 632 comp cams LS valve locks with the smaller bead lock)

Requires valve spring seat and seal modification (tooling available)

  • ID of seat needs to be .655" or less
  • Stock valve seals will not fit
  • Either run no seals or new seals that are smaller then .655" in diameter
  • Optional seals available will need guide cut down to .500"

Spring seat can be cut with Comp Cams 4716 cutter and Howards 92085 pilot.

Valve guide can be cut with Comp Cams 4715 cutter and Howards 92085 pilot.

We suggest using Comp Cams 511 seals.

Most machine shops can cut your head to fit these springs.

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