Valve Spring - RPM Series - Dual Spring - 425 lb/in Spring Rate - 1.055 in Coil Bind - 1.280 in OD - GM LS-Series - Set of 16

Valve Spring - Race Sportsman - Dual Spring / Damper - 332 lb/in Spring Rate - 1.200 in Coil Bind - 1.475 in OD - Set of 16

Valve Spring - Dual Spring - 367 lb/in Spring Rate - 1.100 in Coil Bind - 1.489 in OD - Set of 16

Valve Spring - Race Sportsman - Dual Spring / Damper - 354 lb/in Spring Rate - 1.160 in Coil Bind - 1.550 in OD - Set of 16

Valve Spring - Race Endurance - Dual Spring / Damper - 439 lb/in Spring Rate - 1.160 in Coil Bind - 1.553 in OD - Set of 16

Valve Spring - Dual Spring - 550 lb/in Spring Rate - 1.100 in Coil Bind - 1.555 in OD - Set of 16