You can look into getting the Competition Drive Train (part# CT045). Not sure what all comes with this part but it should be everything you need. Or you can get the 16T pulleys (part # CT015; comes with 2-16T and 2-17T pulleys) and put them inplace of both 25T pulleys. You will also need 2 new belts main belt CT019 and rear belt CT011. That should be everything you need to get the car moving faster from the start. You will lose about 5 to 10 mph with this conversion.

Also look into up-grading you brakes. Its the cheapest up-grade for your car. Your car will stop a lot faster with no brake fad like with the fiber disk. You will be getting the metal brake disk with brake pads. (Part# GX38 for the Disk and pads; Part# GX37 for replacement pads.) When you get the pads, you will want to up CA glue to glue the pads to the metal shoes. The glue will help with better supporting the pads under braking. After you get the pads on the metal shoes, take some fin sand paper to clear the edges and lightly scuff up the pads to get the waxy coating off the pads.