Swift Springs Coilover Helper Springs - ID: 25mm (1") Gtx 2006 Ford F-450 Super Duty

2006 Ford F-450 Super Duty 4 X 4

Ride-Height Adjustable Yes Damping Adjustment Non-Adjustable Spring Rates - Front Progressive Spring Rates - Rear Progressive Quantity Full Set (Front & Rear) Notes Only for Cars with Damper Diameter 50mm (Not 48

2012 Honda Civic Type R

2025 Cadillac XT5

1987 Honda Prelude 4WS (BA4)

Swift Springs Coilover Helper Springs - ID: 25mm (1") Gtx 2006 Ford F-450 Super DutySwift Springs Coilover Helper Springs in 25mm (1") ID and 5" length prevent your main coilover spring from dismounting the perch during droop travel, without adding meaningful spring rate to the stack. These compact 25mm ID Swift helper springs are precision engineered for small bore coilover dampers, keeping the spring securely seated under negative or zero load conditions where preloading the main spring is not possible due to ride height