Valve Spring: Specifications

Valve spring free length 43.2 mm (1.701 inch)
Valve spring compression pressure-intake 365 N (82.1 lbs.) @ 25.1 mm (0.988 inch)
Valve spring compression pressure-exhaust 422 N (94.94 lbs.) @ 26.1 mm (1.0275 inch)
Valve spring installed height 34.2 mm (1.346 inch)
Valve spring installed height-service limit 34.2 mm (1.346 inch) ± 0.65 mm (0.0256 inch)
Valve spring installed pressure-intake 145 N (32.596 lbs.)
Valve spring installed pressure-exhaust 180 N (40.464 lbs.)