this particular topic might be found easily in the search engine...but if you don't know what you're searching for then the search engine isn't gonna make your situation easier
pretty much what I have to say is...
for ground effects you're gonna have to wait on those...there are currently 2 group buys going on for body kits that are going to be produced for pre98s...if you're interested you might wanna take a trip to the group buy forum and look around for those 2 threads.
for exhaust if you have a Duratec engine you have a few options such as Brullen, Borla, Bassani, TruBendz, Bosal and thats probably all I can remember...those are usually made for the SVT Contour but what you can do is get a hanger for the exhaust so the right side muffler can be hung...if you have a zetec they have to add about a foot of pipe after the y pipe or somewhere around there (can't remember) to make it long enough to fit.
now if you have a Zetec, u could get a used SVT exhaust...but I think u'd get more gains if u took your car to an exhaust shop and tried to work out a deal with them for a custom exhaust on your car...maybe like a single exhaust system with 2.25" or 2.5" piping from the cat all the way back
if you have a zetec u can get CTA intake from
ctamotorsports.com and if u have a duratec I think there are a few options on
BAT or u can look on CTA too...
also take a look on the main page, there are a few links to where u can get parts for your car somewhere on there...
also if you're lookin for rims just remember our bolt pattern is 4x108 and thats the same as 4x4.25 and that you're gonna need a 40 offset...some people do have rims with a 45 offset but u could have an issue with tire rubbing then