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Ferrea dual valve spring with damper supplied as a set of 16, specified with 1.225–1.570 inch diameter, 1.04/1.56 OD and 0.74/1.145 ID in the product description. This dimensional set is offered to match valvetrain requirements where that size range is required, providing a complete 16-piece kit for appropriate cylinder heads.
Ferrea 1.225in to 1.570in Dia 1.04/1.56 OD 0.74/1.145 ID Dual w/Damper Valve Spring - Set of 16
