Valve Spring - Professional - Dual Spring / Damper - 507 lb/in Spring Rate - 1.190 in Coil Bind - 1.550 in OD - Set of 16

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

Valve Spring - Dual Spring / Damper - 480 lb/in Spring Rate - 1.130 in Coil Bind - 1.550 in OD - Set of 16

Valve Spring - Dual Spring / Damper - 460 lb/in Spring Rate - 1.170 in Coil Bind - 1.550 in OD - Set of 16

Valve Spring - SP-Series - Dual Spring / Damper - 460 lb/in Spring Rate - 1.170 in Coil Bind - 1.550 in OD - Set of 16

Valve Spring - Dual Spring / Damper - 377 lb/in Spring Rate - 1.089 in Coil Bind - 1.540 in OD - Set of 16