Eugene,
What setup are you using for track days? Any suggestions for the track?
My current track car is a 95 Mustang GT with a bunch of track stuff but I'm itching to see how my stock Si does on the track. I'll be getting Falken RT-615s mounted soon and I also need to install the Carbotech street/track brake pads that I recently received. Other than the tires and brake pads my car will be stock as a rock.
On a related note, I was at WSIR in February for a NASA event (with the Mustang) and a guy in my group (HPDE 3) had a blue 06 or 07 Si. He was doing pretty well with it and was one of the fastest in the group. I think his only mods were aftermarket rims and tires.