Valve Spring

Valve spring free length (approx.) 51.77-54.97 mm (2.04-2.16 inch)
Valve spring squareness 2 degrees
Valve spring compression pressure 720.0-800.0 N @ 28.80 mm (161.9 lb @ 1.13 inch)
Valve spring installed height 42.3-42.9 mm (1.67-1.69 inch)
Valve spring installed pressure 283.0-321.0 N @ 42.56 mm (63.61 lb @ 1.68 inch)