Valve Spring - Single Spring - 256 lb/in Spring Rate - 1.200 in Coil Bind - 1.250 in OD - Small Block Chevy - Set of 16 MPN - R2 This is valve springs only RETAINER GMP10241744 KEEPER GMP24503856 INDIVIDUAL SPING PART NUMBER: GMP10212811 Vendor CHEVROLET PERFORMANCE Truck Freight-- NO