Beehive Valve Spring Kit for 5/16" Valves, .660" Lift


Order No. 20-21500

  • Max Lift: .660"
  • Installed Height: 1.860"
  • Seat Pressure: 178 lbs.
  • Open Pressure: 371 lbs @ .660" Lift
  • 9º taper
  • Supersedes HVS-6500S

Springs are engineered for each application using proprietary advanced spring design, simulation and analysis software. Engineers pay special attention to cam and spring harmonics, stress, mass and operating rpm. Premium grade, super clean ground chrome silicon wire is x-rayed at regular intervals to check for inclusions, heat treated  and shot peed to ensure maximum spring life.

Kits include 4 retainers, 4 springs, 4 keepers and 4 basewashers.