Ford Coyote and Boss 5.0L enginesMax LiftSeat LoadOpen LoadRateCoil BindOuter DiameterInner Diameter.550"93 lbs @ 1.57"198 lbs @ 1.02"191lbs/in.952"Top .959" / Bottom 1.061"Top .636" / Bottom .738"Please note the above image does not show full spring kit...