Crower 68404-12 Features:

Crower 68404-12 Tungsalloy dual valve springs, standard style, set of 12 Installed height 1.600 in., seat pressure 110 lb to 113 lb, open pressure up to 319 lb Nose pressure 287 lb at 1.100 in., spring rate 338 lb/in., coil bind 0.880 in. to 0.950 in. Outer spring ID 1.055 in., inner spring ID 0.780 in.; machine work required for installation

Valve Springs 1.405 Tungs Tungsalloy Dual 1.600 In. Installed Features:

• Tungsalloy dual valve spring set, 1.405 in. OD design, set of 12 for matched valvetrain setup and consistent spring control at higher rpm applications
• 1.600 in. installed height with 110-113 lb seat pressure, supporting stable valve seating and dependable camshaft control across performance builds
• 287-319 lb open pressure range with 338 lb/in. spring rate, helping maintain valvetrain stability and reduce float in higher-rpm operation
• 0.880-0.950 in. coil bind height with 1.055 in. outer spring ID and 0.780 in. inner spring ID for fitment-specific performance planning
• Standard-style dual spring configuration requiring machine work, built for reliable high-rpm operation when properly matched to the camshaft and setup