That thing is called an isolator and the spring fits into the isolator, I took the isolator out and then put the BB where the isolator was, granted I had to dremel out the bottom of the BB so it will fit around the retainer at the bottom (then used a rubber mallet to get it on the retainer good and snug) then if you notice the BB is cupped out and the isolator fits in that perfectly or at leat the Daystar BB was. So basicly going from the bottom is should be coil spring retainer, BB Spacer, rubber isolator, coil spring, then top spring retainer.
99 GC Limited - 4.7L HO V8, 6.5" IRO HC LA lift, F&R D44s locked & trussed, 242HD, IRO TC Skid, KMA Bumper, 35's
2006 Saturn Redline -2.0L Eaton supercharged I4, GMPP Stage 2, Custom Tune, AEM CAI, Ebiach Pro Kit w/ swaybars, EVO Ventus V12s (13.76 @ 103.85)
2006 Pontiac G6 GTP
2012 Nissan Juke - (hers)
2000 SV650 - naked, integrated tail light, sliders, corbin, pilot roads, RK chain & sprokets, D&D full exhaust, FactoryPro Stage I jet kit, +4 Ignition Advancer, Barnett race clutch
2006 Triumph America 900 - Full Dresser
January 2009 Grand Cherokee of the Month (GCOTM)