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Valves & Valve Springs

WARNING: This page is about a different car, the 2002 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.
VALVES & VALVE SPRINGS

Application Specification
Valves
Face Angle 45°
Margin
Exhaust .106" (2.69 mm)
Intake .083" (2.11 mm)
Valve Springs
Free Length 1.89" (48.0 mm)
Installed Height 1.70" (43.2 mm)
Lbs. @ In. (kg @ mm) 
Pressure
Valve Closed 75 @ 1.70 (34 @ 43)
Valve Open 230 @ 1.26 (105 @ 32)