DescriptionSetupCoil Bind (in)Install Height (in)Seat Pressure (lbs)Open Pressure, 11.50mm liftMaximum Valve Lift (in)Dual Conical0.7901.368 / 1.09295233lbs @ 0.915″ / 0.639″0.512Max RPM: 10,000 RPMMax boost: 40 psiThe GSC Power-Division Dual Conical Valve Spring Kit with Ti Retainer & Chromoly Seats for the Subaru Turbo EJ platforms includes 16 titanium retainers, 16 dual conical valve spring sets, and 16 chromoly valve spring seats.