Ultra Series Valve Spring, Double Spring w/Damper, 1.515 O.D x .706 I.D. Lunati Ultra Series valve springs are made using the latest technology in Super Clean High Tensile Chrome Silicon wire along with cutting edge manufacturing processes.
235 Lbs Seat Pressure @ 1.950 Installed Height, 590 Lbs Open Pressure @ 1.250, 1.170 Coil Bind.