I did 27mm rear & 24 front on the Type r & its was like a go-cart, but awful, due to zero body roll had no idea when the back end would break out.
On the old sti i had a 22mm on the rear & std with uprated bushes on the front, ALK, lowering springs, parda spec 2's & a full alignment & it was very good fast B road racer set up IMO