Valve Spring - Race Endurance - Dual Spring - 551 lb/in Spring Rate - 1.160 in Coil Bind - 1.565 in OD - Set of 16

Valve Spring - Triple Spring - 689 lb/in Spring Rate - 1.130 in Coil Bind - 1.660 in OD - Set of 16

Valve Spring - Triple Spring - 681 lb/in Spring Rate - 1.145 in Coil Bind - 1.660 in OD - Set of 16

Valve Spring - Triple Spring - 687 lb/in Spring Rate - 1.130 in Coil Bind - 1.660 in OD - Set of 16

Valve Spring Kit - Beehive Spring - 313 lb/in Rate - 1.140 in Coil Bind - 1.290 in OD - Locks / Chromoly Retainer - Viton Seal - Seat - GM LS-Series - Kit

Valve Spring Kit - Dual Spring - 370 lb/in Rate - 1.010 in Coil Bind - 1.290 in OD - Chromoly Retainer / Locks / Viton Seal / Steel Seat - GM LS-Series - Kit