Ferrea dual valve spring with damper supplied as a set of 16, specified for springs with 1.600–1.650 inch active diameter, 1.065/1.625 OD and 0.77/1.175 ID per the description. This set provides the dimensional match a builder or machinist would use when selecting springs by size, and is sold as a complete 16-piece set for compatible valvetrain assemblies.
Ferrea 1.600in to 1.650in Dia 1.065/1.625 OD 0.77/1.175 ID Dual w/Damper Valve Spring - Set of 16