yes,FSVT wheels will fit. I run a base model Contour with CSVT rims. I used to have a '98 Mystique 4 cyl auto. Mechanically left it stock as I thought it was a terrible car and not worth modifying,so all I did was add a stereo system,and modify the body and interior.
But yeah,there's a guy on here running around with a supercharged 4 cyl,putting about around 160hp,up from 125 stock. There's all sorts of lowering kits available and pretty much anything else you want. ALMOST anything that is made for a Contour will work on a Mystique.
Check out
www.ctamotorsports.com for an idea of what kind of stuff is available for our cars. It's a Canadian site,but also has prices in USD.
Good luck. Mystique's are nice cars,but if you really want performance,your best bet is to trade up to a V6 model like I did. I actually went to the local Ford dealer and traded in my Mystique for a '95 Contour V6 5 speed. I've never made a better choice in my life.
