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About Xceldyne Spring Seats

Xceldyne Spring Seats

  • Precision CNC machined from 8620 case hadened steel
  • High tolerances ensure seats are flat for longest possible life. Cheaper non-flat seats fracture and eventually disintegrate at rpm which distributes like shrapnel throughout your engine
  • Pad is parallel to bottom surface for consistent spring pressures
  • Specially designed for CV4s valve springs
  • Must be used with PSI Springs.

Warning:  California Proposition 65

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