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		| Originally posted by Operatic i thought ground control used eibach springs? so wouldn't that classify them under true coil overs? work with me here, i'm not quite sure what a true coil over is, i should really do my homework on this stuff.
 
 also, what company do you think makes the best coilover?
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True coilovers come packaged with an integrated spring/strut combo.  These perform by far the best.
Sleeves are just springs with an adjuster on them.  These will still need to be paired with a separate strut.  GC does use Eibach springs, but they are the ERS spring series.