The Ferrea dual valve spring set spans 1.225–1.570 in diameter with OD 1.025/1.57 and ID 0.74/1.135, provided as a 16-piece kit with dampers. These dual springs fit applications that require that OD/ID profile and are intended to pair with inner springs and retainers to maintain stable valve control under load. Sold as a complete matched set.
Ferrea 1.225in to 1.570in Dia 1.025/1.57 OD 0.74/1.135 ID Dual w/Damper Valve Spring - Set of 16