Crower 68440-1 Features:

Crower 68440-1 dual valve spring for LS engines; single spring design for performance valvetrain upgrades. 1.324 in. OD, 0.694 in. ID, 2.250 in. free length, and 1.800 in. installed height. 460 lb/in. spring rate with 0.127 in./0.183 in. wire diameter; no internal damper. Heavy-duty dual-spring design helps control valve float and supports high-lift camshaft, high-rpm use.

Valve Springs Dual Ls 1.3 1.324 In. Od, 460 Features:

• Dual-spring LS valve spring, 1.324 in. OD, 0.694 in. ID, 2.250 in. free length for performance valvetrain stability
• 460 lb/in. spring rate supports high-lift camshafts and sustained high-rpm operation with reduced valve float risk
• 1.800 in. installed height critical for designed seat pressure and consistent lifter-to-cam lobe contact under load
• No internal damper design with 0.127/0.183 in. wire diameter for controlled motion in demanding racing applications
• Heavy-duty dual-spring construction helps resist coil bind and protects LS valvetrain components during high-rev use