There are some small tricks you can do to improve your times, but they will only be worth maybe a tenth... Air up the front tires to the maximum printed on the sidewall. This reduces rolling resistance, but only air up the front tires. Take the spare tire and junk out of the trunk. With only an offroad H pipe, I managed the time in my signature. I shift at 5k on the dot and power shift every gear. My best 60' was a little slower at 2.1-something. You can get an offroad pipe and timing adjuster for about your budget, but may have to build your MIL eliminators to get the check engine light to turn off (do a search). These two mods, the tricks above and some good driving should get you a 13 first.