1.580 Spring Cups Valve Spring Locator - Inside - 0.062 in Thick - 1.570 in OD - 0.635 in ID - 0.835 in Spring ID - Steel - Black Oxide - Set of 16

1.550 Dual Valve Springs Valve Spring - Dual Spring / Damper - 508 lb/in Spring Rate - 1.080 in Coil Bind - 1.550 in OD - Set of 16

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 - 1.437 Valve Spring - Dual Spring - 283 lb/in Spring Rate - 1.025 in Coil Bind - 1.437 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