My fastest in smf was on a set of pretty shot advan. Ao48 in 195_50 or 55_16 on a set of 05 focus ST 16" wheels. This was also on stock springs and dampers, with a pierce 6 point brace up front and that was it for chassis mods. It was on a stock tune and had a boomba bov spacer (which put me in smf) also on stock summer pads.