If you have a MTX a lighter flywheel quafie Diff, if ATX a levelten upgrade then there is always Super chargers, Turbo chargers, Pistons, Rods, Cams, Intake manifiold, headers, Pulleys, Cam gears, Intakes, fules systems, Well thats a little above and beyond
This best thing to do IMO to boost acceleration is a Shortty header highflow cat and Flexpipe (2.25 inch) then a custom made system form the there with a 65MM TB intake and a UDP setup and a chip for the auot this will help alot. All these parts are for the focus. They will fit or take very little modifiying to fit.
