When I autocrossed with my 00 Civic Si I couldn't drop it more than 2" with OTS Koni Yellows. The shocks would bottom out. I called the rep and he confirmed it with me. If I wanted lower I would have to get the Ground Control top hats.
Did you put the clip on the middle of each shock (front and rear). On the Koni fronts you have 3 levels you can put the clip that holds the coilovers in place. Which one did you put it on? Same for the rear.
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