I'm looking to register for the upcoming autocross, and I'm not entirely sure on which class is appropriate for my 1986 325e. I'm not sure if the E36 rack and pinion swap I did when I refreshed my front suspension would move my car from Tuner 4 to Modified 4. My car's otherwise stock, aside from E36 M3 bushings on the front control arms, and a manifold-back "custom" exhaust from the previous owner.