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The Ferrea dual valve spring set covers a diameter range of 1.225–1.570 in with OD 1.025/1.57 and ID 0.74/1.135, supplied as a 16-piece kit with dampers. These dual springs are built for paired inner/outer valvetrain setups that need compact sizes across that diameter span. Sold as a full set to service multiple valve locations with matched damped springs.
Ferrea 1.225in to 1.570in Diameter 1.025/1.57 OD 0.74/1.135 ID Dual w/Damper Valve Spring- Set of 16
