maybe,
Switch to adjustable coil overs and adjust the drop to a measurement that doesn't rub (1.000 to 1.375)?
185/60r14 = stock for the Si
195/50r15 = common upgrade
205/45r16 = slightly bigger diameter than stock (more likely to rub)

How much travel does your suspension have before it hits the stops with a 1.75" drop?

I hope you installed front and rear camber kits. (otherwise your car will eat the inside edges of your tires pretty quickly)

take care,
ChrisS