Hey last post - WTF!??? wrong forum. smoke another one mr420
Just about everything you can do will give minimal return. Underdrive pulley, performance ignition, tuning, exhaust ypipe and custom pipe, roller rockers. I know at some point I saw a stroker kit for it, whether or not that's still available, oh along with the camshaft, I'm not sure. Nor do have I heard of anyone using them, so don't know if it does anything, the website I saw it on didn't give any specs for them either. And don't forget there's always the kandn air filter...
So as far as reasonable cost goes, I have a kandn air filter, 45 bucks and clean the maf every oil change. Underdrive pulley I got for cheap at shosource before the cost went upupand away. 8.2mm thundervolt wires were I think 60 bucks. Normal maintenance and higher tire pressure (38fr 35rr) gets me under 20mpg driving around Boston and the suburbs.
So unless you're obsessed with putting parts that are unnecessarily better than stock, you're better off keeping up with maintenance, keep the car clean inside and out, tire pressure, driving like grandpa, and only use the a/c on the highway over 55 (windows up makes the car more aerodynamic at higher speeds while lower speeds the a/c will cause more of a drag-fact, not my opinion).
oooo quick response mods or whoever does that stuff. disregard first line.