If you look at the STS results you'll see me. If you look at the PRO results, you'll see (Former National Champion) Jason Frank about 2.8 seconds faster in a SpecCivic.
My Focus was daily driven on H&R race springs and Konis and only had 6.5" wide wheels...not even close to a full-on ST build.
Was also the fastest street-tire car, and 4th overall at at a National Focus meet in South Bend in 2005 (sponsored by a different Focus web forum). Sedans do just fine.