• 
  Advanced Spring Design with special attention to cam and spring harmonics, stress, mass and operating RPM
• Premium-grade, super clean ground chrome silicon wire
• Heat treated and shot-peened for long life
• Kits include 8 retainers, 8 springs and 8 basewashers (NOTE: Kit 20-21205 does not require basewashers, it is compatible with OE seals or Tophat viton valve seals (71046) which are included

Order No. 20-21050: .465" Max. Lift | 1.410" Installed Height | 80 lbs. Seat Pressure | 212 lbs. Open Pressure at .465" lift

Order No. 20-21205: .550" Max. Lift | 1.550" Installed Height | 85 lbs. Seat Pressure | 257 lbs. Open Pressure at .550" lift