Crower 68365-16 Features:

Crower 68365-16 Tungsalloy triple valve spring set, 16-piece, 1.680 in. classification Seat pressure 259 lb at 1.925 in. installed height; open pressure 654 lb at 1.300 in. Spring rate 624 lb/in.; coil bind 1.230 in. for high-rpm mechanical roller camshaft setups Outer OD 1.670 to 1.680 in.; outer ID 1.245 in.; inner ID 0.640 in.

Valve Springs 1.680 Tungs Triple Tungsalloy, 259 Lb Seat, Features:

• 1.680 in. Tungsalloy triple springs for high-rpm mechanical roller camshaft valvetrain stability and control
• 259 lb seat pressure at 1.925 in. installed height for precise valve motion control in extreme racing applications
• 654 lb open pressure at 1.300 in. with 624 lb/in. spring rate for high-lift valvetrain performance at elevated rpm
• 1.230 in. coil bind limit with 1.670-1.680 in. OD and 1.245 in. outer spring ID for fitment planning
• 16-piece valve spring set engineered for high-pressure racing use; cylinder head machine work may be required