Valve Spring Set

Valve spring set.

Technical specifications: 
O.D.: 31.75 mm
I.D.: 17.3 mm
Seat Pressure: 90 lbs. @36 mm
Open Pressure: 277 lbs. @23.3 mm
Max Lift: 12.7 mm
Coil Bind: 20.7 mm
Installed Height: 36 mm

Compatibility

Porsche 911 '65-89

Porsche 964 '89-94

Porsche 964 Turbo '89-94