<font color=blue> Roll up the windows and turn off the air, that should give you a couple more MPH!
Tell us all that you have and we can have a better idea on what suggestions to offer. Is it a stocker? Maybe a cam or a header? New exhaust and a K&N filter is always a good bet. How much power are you looking for and in what power range?
We have a good little combination kit which uses some of the industries best components for a good upgrade, the 'Power Punch' (Thorley header, Isky cam, K&N Filtercharger). http://www.rocky-road.com/zukengine.html