I remember the R390. This was during the time when the GT LeMans race cars had to have street versions, like the MB CLK-R. Many of them sold for (or were priced at) a cool million. I seem to recall that when the 390 showed up for LeMans it was fast, but didn't meet the specs because it needed to have "luggage space" or space for a spare or some ridiculous, quirky FIA thing. They fabbed a compartment in the back, and during the race, the compartment blocked air flow to some coolers and the car DNF'd for that reason. Anyway, when AutoWeek did a test drive of the "street" version, I understood it to be a pure race car, barely capable for street use. This makes me appreciate the McClaren F1, which is a wonderful street car that actually had to be de-tuned to race in GT....