I autocross in Western Michigan with a couple of groups (SCCA, Furrin Group) and I was put into STX class (Street Touring for cars w/bigger than 3.0l engines, up to 5.0l). I recently beat a Subaru WRX turbo. I have STB's, 12" brakes, race tires, and soon Poly bushings. I figure if I ever destroy the tranny, I'll add LSD which still keeps me in STX. If anybody is interested in autocrosses in West Michigan, send me an e-mail. We have about a dozen scheduled for this year (and a couple of rallycrosses, autox in the dirt! but I use my old Triumph for that).