1.240 Dual Valve Springs Valve Spring - Dual Spring - 320 lb/in Spring Rate - 1.020 Coil Bind - 0.915 / 1.240 in OD - Set of 16

Dual Valve Springs - 1.500 Valve Spring - Dual Spring - 413 lb/in Spring Rate - 1.100 in Coil Bind - 1.500 in OD - Set of 16

Dual Valve Springs - 1.437 Valve Spring - Dual Spring - 283 lb/in Spring Rate - 1.025 in Coil Bind - 1.437 in OD - Set of 16

1.580 Dual Valve Springs Valve Spring - NexTek - Dual Spring - 535 lb/in Spring Rate - 1.170 in Coil Bind - 1.580 in OD - Set of 16

1.560 Dual Valve Springs Valve Spring - NexTek - Dual Spring - 533 lb/in Spring Rate - 1.200 in Coil Bind - 1.560 in OD - Polished - Set of 16