The Teraflex 2.5" springs don't make sense to me. I installed them on my 2012 JK Sport. The 2.5" rear springs were almost the same size as the stock springs. I re-measured 2 weeks after installing my lift which showed 3.25" in the front, and 1" in the rear. But, to be fair, my measurements were taken on an asphalt driveway, not a flat concrete slab. I'm installing a 1" Teraflex rear spacer this week, which should give my JK the lift that I was expecting.
2012 JK Sport S, 3.6L, Auto, TF 2.5" coil lift & 1" Spacers, Rancho RS9000XL, RC control arm drop kit, TF monster track bar, 35" Pro Comp Radial Xtreme ATs on 16x8 AR172 Baja, ACE rear bumper & tire carrier, ACE Rock Sliders, Bushwacker Flat Fenders