Valve Spring - Dual Spring / Damper - 391 lb/in Spring Rate - 1.129 in Coil Bind - 1.442 in OD - Set of 16 Brand- COMP CAMS MPN 26987-16 . **NOTE: 391lbs Spring rate1.800 install height Truck Freight- NO State Restrictions Canada Restrictions- NO Canada Shipping: Ships to Canada