yeah, in the GC/Koni Yellow setup, the GCs that are referred to are sleeves.

nowadays, you can get a set of KSport full coilovers (they come fully assembled and all) for around 600-650, and you can adjust everything. I've had them on my sedan since around Christmas time and they're simply amazing...I have no complaints at all.

there are a bunch of ppl on the TI.net forums who participated in a group buy on them, aside from several other people who already have them

PM me if you have specific questions about these coilovers, i'd be glad to answer them.