Crower 68405-12 Features:

Crower 68405-12 Tungsalloy dual valve springs, set of 12 for high-performance and racing valvetrain applications. Outer spring dimensions: 1.405 in. OD, 1.045 in. ID; inner spring ID measures 0.770 in. Spring rate is 382 lb/in.; seat pressure is 110 lb at 1.700 in. installed height. Nose pressure is 297 lb at 1.200 in.; coil bind height is 0.980 in.

Valve Springs 1.405 Tungs Dual Tungsalloy 110 Lb Seat Features:

• Dual Tungsalloy springs, 1.405 in. OD, set of 12, built for high-performance valvetrain control and stable operation with demanding cam profiles.
• 382 lb/in spring rate, 110 lb seat pressure at 1.700 in., helps maintain consistent valve motion and reduced float in racing applications.
• 297 lb nose pressure at 1.200 in., 0.980 in. coil bind height, matched for high-lift setups requiring precise spring load management.
• 1.045 in. outer spring ID and 0.770 in. inner spring ID, dual-spring design supports valvetrain stability under elevated RPM conditions.
• Machine-work installation application, commonly paired with performance camshafts where proper spring tension is critical for control, durability, and response.