1.500 NexTek Dual Valve Springs Valve Spring - NexTek - Dual Spring - 797 lb/in Spring Rate - 1.130 in Coil Bind - 1.500 in OD - Set of 16

1.500 NexTek Dual Valve Springs Valve Spring - NexTek - Dual Spring - 800 lb/in Spring Rate - 1.130 in Coil Bind - 1.500 in OD - Set of 16

1.500 Dual Valve Springs - (16) Valve Spring - 1300 Series Drag Race - Dual Spring - 780 lb/in Spring Rate - 1.130 in Coil Bind - 1.500 in OD - Set of 16

1.640 NexTek Dual Valve Springs Valve Spring - NexTek - Dual Spring - 647 lb/in Spring Rate - 1.070 in Coil Bind - 1.640 in OD - Polished - Set of 16

1.550 NexTek Dual Valve Springs Valve Spring - NexTek - Super Finish - Dual Spring - 618 lb/in Spring Rate - 1.150 in Coil Bind - 1.550 in OD - Set of 16

1.530 NexTek Dual Valve Springs Valve Spring - NexTek - Dual Spring / Damper - 435 lb/in Spring Rate - 1.170 in Coil Bind - 1.530 in OD - Set of 16