Valve Spring - RPM Series - Beehive Spring - 400 lb/in Spring Rate - 1.544 in Coil Bind - 0.825 in / 1.270 in OD - Set of 16

Valve Spring - Dual Spring / Damper - 473 lb/in Spring Rate - 1.085 in Coil Bind - 1.550 in OD - Set of 16

Valve Spring - Dual Spring - 325 lb/in Spring Rate - 0.900 in Coil Bind - 0.963 in OD - Each

Valve Spring Kit - Dual Spring - 505 lb/in Rate - 1.100 in Coil Bind - 1.320 in OD - Titanium Retainer - Viton Seal - Steel Seat - GM LS-Series - Kit

Valve Spring Kit - Dual Spring - 400 lb/in Rate - 1.070 in Coil Bind - 1.320 in OD - Steel Retainer / Viton Seal / Steel Valve Locks / Steel Seat - GM LS-Series - Kit

Valve Spring - Performance Street - Dual Spring / Damper - 347 lb/in Spring Rate - 1.175 in Coil Bind - 1.509 in OD - Each