1.600 Dual Rad Valve Springs w/Damper Valve Spring - RAD-9000 - Dual Spring / Damper - 600 lb/in Spring Rate - 1.160 in Coil Bind - 1.600 in OD - Set of 16

1.470 Dual Valve Spring Kit - w/Damper Valve Spring - Dual Spring - 399 lb/in Spring Rate - 1.080 in Coil Bind - 1.470 in OD - Locks / Chromoly Retainers - Kit

1.539 Dual Valve Springs (16) w/Damper Valve Spring - RPM Series - Dual Spring / Damper - 500 lb/in Spring Rate - 1.130 in Coil Bind - 1.539 in OD - Set of 16

1.550 Pro Valve Springs Dual w/Damper Valve Spring - Professional Series - Dual Spring / Damper - 458 lb/in Spring Rate - 1.180 in Coil Bind - 1.550 OD - Set of 16

1.538 Dual Valve Springs w/Damper 16pk Valve Spring - Hot Rod Series - Dual Spring / Damper - 436 lb/in Spring Rate - 1.090 in Coil Bind - 1.538 in OD - Set of 16

1.514 Dia. Dual Valve Spring Kit w/Damper Valve Spring Kit - Dual Spring / Damper - 348 lb/in Rate - 1.150 in Coil Bind - 1.514 in OD - Locks / Chromoly Retainers - Kit