PAC 1903 Springs.

• installed Height/Pressure: 1.800"--145#

• Pressure @ .550" lift: 358#

• Pressure @ .600" lift: 375#

• Pressure @ .650" lift: 400#

• Pressure @ .700" lift : 425#

• Coil Bind: @ .750" lift

• Outer Spring ID/OD: 1.075" /1.459"

• Inner Spring ID/OD: 1.078" / .794"

• Type of Spring: Dual

• Spring Rate 391

Best to ask PHR.....