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I am not 100% sure on this, but I remember a thread a while back, stating that a "tune would be Stage 1, adding exhaust- stage 2, IC piping and Intercooler- stage 3. Check with ADM. I think thats where I remember the thread.
Kind of in the same mode as Roush. the first kit is all cosmetic, exhaust and handling with real performance mods coming in stages 2 & then supercharged up the ying yang stage 3 with all the bells & whistles.
Here's to the GM Stage 3! 400HP
whatever they call it!
Solstice, Sky, and HHR LNF Turbo Upgrade Kit Stage III (19212672)