I used to take my e46 on several tracks (Laguna, Buttonwillow, Willow Springs, Vegas, Calif Speedway, etc) with the BMW club. It was a lot of fun and I never ran into the overheating etc problems that the e36's ran into. Although on Willow Springs there was a slight hick-up going up turn #2 when the gas gets shoved into the back of the car it gets fuel starved for just a second. Other than that it was SO much fun. I will be taking delivery of new 335i this month and would love to hear what other people are doing! How do run flats work on the track? Last car had a second set of rims and tires but I don't think they have the clearance for e92. Thinking about buying someone elses stock but that means running run flats on the track at least till they wear out.