Contour Enthusiasts Group Archives Forums Modifications Zetec Performance Where's a good place to start....?

For $400 you should be able to get;

1) custom cold air intake, see my post here.
2) 2.25" flex-pipe back custom exhaust or stock SVT Exhaust
3) crank under-drive pulley
4) optimized throttle body

With proper fund management and a little shopping around you should be at or maybe a few dollars over budget.